Prince William has sparked speculation following Kate's nod to Princess Diana. The Princess of Wales performed a solo engagement at the Royal Marsden Hospital on Tuesday, marking the occasion with a meaningful new addition to her jewellery collection.

"Prince William is dedicated to duty, as imbued in him by Queen Elizabeth II, who tutored him every Sunday regarding his royal duties," royal expert Hilary Fordwich told Fox News Digital. "He's also under huge generational pressure since the increasing public popularity of the monarchy ranks highest for both him and Princess Catherine."

Prince William is making his first royal outing of the year (and taking on a new patronage) after Kate Middleton announced she is in "remission" from cancer.