What do pregnant Kate Middleton and Prince William squabble over? The answer might surprise you.

It turns out that the couple are huge board game fans, and neither of them is thrilled to lose at Scrabble, according to a new UK documentary called Our Queen.

“When William and Kate play Scrabble, they don’t usually finish it  because one of them slams it shut,” the new film reveals.

Who knew they were so competitive with each other? Then again, it's kind of adorable to imagine them getting into a huff over someone's double word score.

The otherwise-peaceful couple are expecting their first child in July, while the documentary on the royal family premieres on British channel ITV on March 17. 

Words with Friends? More like, Words with Nemeses!

Source: Our Queen via Hollywood Life