Prince William was once photographed looking and acting funny while at a state banquet with Kate Middleton, Prince Philip, and Queen Elizabeth II.

The snap, which was uploaded on Instagram by a royal fan, shows the Duke of Cambridge stifling a giggle. He is wearing formal attire while standing beside his wife and grandfather.

Her Majesty, the Duke of Edinburgh, and the Duchess of Cambridge all look prim and proper in the photo. But the dad of three stands out because he seems to be stopping himself from laughing out loud.

One royal fan commented on the photo and joked that Prince William was probably thinking of something funny while the photo was being taken.

“Every time I see William’s expression in this photo, I can’t help but think about what he is thinking. He looks like he is thinking, ‘I feel pretty silly in these pants,’” the fan wrote.

Prince William also appears to look short in the photo because of the pants that he is wearing. Prince Philip, who is much shorter than his grandson is wearing the same attire but he looks dapper in it. It seems that Prince William’s pants are too big for him so he appears short in the snap.

The royal fan that uploaded Prince William’s picture did it to commemorate President Donald Trump’s arrival to the United Kingdom. Prince William and the other members of the royal family met up with the American president and his wife at a state banquet on Monday night.

Prince Charles and Camilla also enjoyed their afternoon tea with the president and the first lady after attending a private lunch hosted by Her Majesty. The Trumps will be in the United Kingdom until Wednesday for their three-day visit.

Last year, Prince William and Prince Charles were accused of snubbing Trump and leaving the monarch to entertain the guest all on her own.

Prince William
Prince William attends the unveiling of The Victoria Cross Commemorative Paving Stones representing each of Birmingham's 1st World War recepients at the Hall of Memory, Centenary Square on Dec. 7, 2015 in Birmingham, England. Getty Images/Richard Stonehouse