Winnie Harlow Prince Harry LEAD
Credit: George Pimentel/WireImage; Alexander Tamargo/WireImage

Sometimes it's tough to resist the perfect opportunity for a photobomb. As America's Next Top model star Winnie Harlow snapped a selfie with her agent at the Audi Polo Challenge in London Saturday, Prince Harry couldn't help but make a funny face when he landed right in the middle of it.

"When you're trying to have a serious convo but your agent and Prince Harry aren't serious at all #photobomb," the model captioned the snap, which showed the royal sticking out his tongue and looking right into the cell phone camera.

Harlow went on to share another shot where Harry and his brother Prince William unintentionally photobombed her during another selfie moment. "Canadian girl on British territory (how did this photog get Prince Will & Harry in this shot!? Very cool)," she wrote alongside the shot that showed the princes chatting with friends in the background. Very cool indeed.

Princes William and Harry weren't just on hand for selfie photobombings though. The duo played on Team Audi Ultra in the polo tournament, with funds raised from the event going to four of the royals' charities, according to People.