LONDON, ENGLAND - JANUARY 10: Prince William, Duke of Cambridge, Royal Patron of Centrepoint meets Sherihan Sharis, 22, as he places a post-it note on his forehead visits a Centrepoint hostel on January 10, 2017 in London, England. The Duke will spend time meeting young people aged 16-25 who rely on the charity to help them turn their lives around. (Photo by Eddie Mulholland - WPA Pool/Getty Images)

LONDON, ENGLAND - JANUARY 10:  Prince William, Duke of Cambridge, Royal Patron of Centrepoint meets Sherihan Sharis, 22, as he places a post-it note on his forehead visits a Centrepoint hostel on January 10, 2017 in London, England. The Duke will spend time meeting young people aged 16-25 who rely on the charity to help them turn their lives around.  (Photo by Eddie Mulholland - WPA Pool/Getty Images)