Prince George and cousin Savannah Phillips share cheeky moment at Princess Eugenie's wedding

Partners in crime!

On Friday, Princess Eugenie married longtime love Jack Brooksbank in a star-studded event at St. George's Chapel at Windsor Castle. And to absolutely zero surprise, the adorable bridesmaids and page boys stole the show!

Princess Eugenie's cousins made up most of the wedding party: Prince George and Princess Charlotte took center stage, as did Savannah Phillips, her younger sister Isla Phillips, and Mia Tindall. Philips and Tindall are the queen's great granddaughters, so it's only natural that they be included on the big day!

While the bridesmaids and page boys lined up to precede Princess Eugenie down the aisle, Prince George and cousin Savannah shared quite a naughty moment that was caught on camera. Savannah, 7, seemed to mimic a trumpet while Prince George looked on. George burst out laughing and then quickly slapped his hand over his mouth.

This isn't the first time the duo has been caught causing trouble. Back at this year's Trooping the Colour, Prince George was hushed by Savannah while on the balcony of Buckingham Palace in a now-viral moment.

The cheekiness didn't stop there.

George, Savannah and Charlotte then followed Eugenie out with the rest of the page boys and bridesmaids, later posing on the steps of the chapel for photographers. While Charlotte was busy perfecting her royal wave, Savannah and George were busy making funny faces and dancing. See the hilarious photos in the gallery above!

See more from Princess Eugenie's big day: