Princess Charlotte made headlines for her playful behavior again this week after poking her tongue out - but the cameras didn't spot Prince George doing something equally entertaining.
The young royals were watching parents Prince William and Kate Middleton go head-to-head in the King's Cup boat race when they amused crowds with their sweet antics.
Charlotte, four, was caught poking her tongue out at onlookers at the charity regatta, prompting an adorable reaction from her doting mum.
But the moment most missed was Prince George, six, eating an ant.
Royal expert and former Mirror correspondent Victoria Murphy spotted the young price tucking into the insect while mum Kate, 37, wasn't looking.
"The Cambridge children had a great day out today," she tweeted.
"Cheeky Charlotte stuck out her tongue at the crowds while George apparently ate an ant!
"They also joined in with activities on the seafront earlier in the day."
The Duke and Duchess of Cambridge competed against one another in the regatta, with Kate heading the boat that finished last after getting disqualified in the second of two races.
Bear Grylls beat the Duke and Duchess of Cambridge to win the first of two races.
William finished the race third, while Kate came seventh - second last.
The second race saw William come fifth and Kate disqualified.
The royal couple, skippers of their own boats, were competing against six other teams.
They were battling it out for the The King’s Cup trophy, a historical cup first presented by King George V at Cowes’ Royal Yacht Squadron in 1920.
Earlier, the couple visited children's attractions in Cowes along with 16-month-old Prince Louis.