Prince George, Princess Charlotte, and Prince Louis, the three children of Prince William and Kate Middleton, sent a heartfelt message to their father on Father’s Day. The trio used a touching photo taken by their mother, Kate Middleton, to wish Prince William a happy Father’s Day.

The photo shows the three young royals hugging their dad while all four look out at the sea. The caption reads, “We love you, Papa. Happy Father’s Day. G, C & L.” The post was shared on the Prince and Princess of Wales’ official social media accounts.

This is the first time the royal children have used social media to wish their father a happy Father’s Day. The post comes a day after Kate Middleton made her first public appearance in months after revealing she has been battling cancer.