Your wedding day is meant to be the best day of your life and not one you want ruining by pesky wedding crashers- but obviously celebs are an exception to that rule.
The likes of Ed Sheeran, Beyonce and even the president of the United States of America have turned up unannounced at normal people weddings and posed for once in a life time photos.
Take a look at the 17 celebs who have definitely made the bride and grooms special day so much more memorable.
When filming the sequel to the De Vinci Code, Tom Hanks spotted a bride who blocked from getting to the church by the film crew. As soon as Hanks spotted the bride in distress he stopped filming and rushed over to help. He even lifted the brides veil off the ground to stop it getting dirty. What a man.