Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton, Prince William, Duke of Cambridge. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Kate Middleton. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. 11 Dec 2018 Pictured: Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, visit Evelina London Children's Hospital in London, UK, on the 11th December 2018. Photo credit: James Whatling / MEGA TheMegaAgency.com +1 888 505 6342

Prince William Duke of Cambridge and Catherine Duchess of Cambridge arriving for a visit at Evelina London Children?s Hospital. Catherine was wearing a dark green polka dot L.K Bennett Mortimer dress - London. 11 Dec 2018 Pictured: Prince William Duke Of Cambridge, Catherine Duchess of Cambridge. Photo credit: mega TheMegaAgency.com +1 888 505 6342

Prince William Duke of Cambridge and Catherine Duchess of Cambridge arriving for a visit at Evelina London Children?s Hospital. Catherine was wearing a dark green polka dot L.K Bennett Mortimer dress - London. 11 Dec 2018 Pictured: Prince William Duke Of Cambridge, Catherine Duchess of Cambridge. Photo credit: mega TheMegaAgency.com +1 888 505 6342

Prince William Duke of Cambridge and Catherine Duchess of Cambridge arriving for a visit at Evelina London Children?s Hospital. Catherine was wearing a dark green polka dot L.K Bennett Mortimer dress - London. 11 Dec 2018 Pictured: Prince William Duke Of Cambridge, Catherine Duchess of Cambridge. Photo credit: mega TheMegaAgency.com +1 888 505 6342

Prince William Duke of Cambridge and Catherine Duchess of Cambridge arriving for a visit at Evelina London Children?s Hospital. Catherine was wearing a dark green polka dot L.K Bennett Mortimer dress - London. 11 Dec 2018 Pictured: Catherine Duchess of Cambridge. Photo credit: mega TheMegaAgency.com +1 888 505 6342

Prince William Duke of Cambridge and Catherine Duchess of Cambridge arriving for a visit at Evelina London Children?s Hospital. Catherine was wearing a dark green polka dot L.K Bennett Mortimer dress - London. 11 Dec 2018 Pictured: Catherine Duchess of Cambridge. Photo credit: mega TheMegaAgency.com +1 888 505 6342

Prince William Duke of Cambridge and Catherine Duchess of Cambridge arriving for a visit at Evelina London Children?s Hospital. Catherine was wearing a dark green polka dot L.K Bennett Mortimer dress - London. 11 Dec 2018 Pictured: Catherine Duchess of Cambridge. Photo credit: mega TheMegaAgency.com +1 888 505 6342

Image ??Licensed to i-Images Picture Agency. 11/12/2018. London, United Kingdom. The Duke and Duchess of Cambridge at children's hospital. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool

Image ??Licensed to i-Images Picture Agency. 11/12/2018. London, United Kingdom. The Duke and Duchess of Cambridge at children's hospital. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool

Image ??Licensed to i-Images Picture Agency. 11/12/2018. London, United Kingdom. The Duke and Duchess of Cambridge at children's hospital. Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive for a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool

Image ??Licensed to i-Images Picture Agency. 11/12/2018. London, United Kingdom. The Duke and Duchess of Cambridge at children's hospital. Prince William, Duke of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool

The Duke and Duchess of Cambridge at children's hospital. Prince William, Duke of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge meets children during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019... Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019... Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge joins some of the children as they take part in Christmas-themed activities during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019.. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge meets children during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge meets children during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge meets children during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019. Picture by i-Images / Pool / eyevine

The Duke and Duchess of Cambridge at children's hospital. Catherine, Duchess of Cambridge meets children during a visit to Evelina London Children's Hospital on December 11, 2018 in London, England. Evelina London, which is part of Guy's and St Thomas' NHS Foundation Trust, is preparing to mark its 150th anniversary in 2019. Picture by i-Images / Pool / eyevine