You just never know where you're gonna randomly run into a celebrity.
A bride named Grace Gwaltney was taking pictures with her bridesmaids in downtown Pittsburgh on Saturday when TOM HANKS crashed the party.
According to Grace, Tom came up behind them and said, quote, "Hey! My name is Tom Hanks. Can I take a photo with the bride?"
She added that she couldn't help thinking about "Toy Story" when he spoke.
The wedding photographer said, quote, "We all lost it. The bridesmaids shuffled out of the limo, and he posed with photos and congratulated everyone, and then as fast as he popped in, he was gone. It was just so sweet and fun!"
(Tom is in Pittsburgh filming a movie called "A Man Called Otto". You can see some pics and watch a local news report here.)