Prince William and Prince Harry were joined by their wives, Kate Middleton and Meghan Markle, to celebrate the 100th anniversary of the Royal Air Force on Tuesday in London. The fab four arrived in style at Westminster Abbey and later took up on the Buckingham Palace balcony to watch the military fly-past. While there, it appeared that Will, Kate, and Meghan shared a laugh at something Harry wasn't in on; the 33-year-old newlywed looked a little confused as the trio cracked up. It reminded us a bit of when Harry was Kate and Will's third-wheeling pal before Meghan joined the show!
Will clearly had the giggles all day, as he was also caught chuckling in his seat by Kate. After the RAF ceremony, Harry and Meghan jetted off to begin their two-day tour of Ireland. Maybe Meghan filled Harry in on the joke during the plane ride? Keep reading to see Harry being left out of the joke.