Kate Middleton marked Prince William's 42nd birthday with an adorable new photo showing the Prince of Wales jumping into the air on a beach trip with their kids. The snap captured a playful moment as William held hands with Princess Charlotte and Prince Louis, while Prince George completed the chain. The photo, taken by Middleton in Norfolk, England last month, was shared on social media along with a heartfelt birthday message from the Princess of Wales. This public celebration comes after Middleton's battle with cancer, which was revealed in March. The royal family has faced challenges this year, but Middleton's recent appearance at Trooping the Colour shows her resilience. Despite her health struggles, Middleton continues to put on a brave face for her family and the public.