15 Celebs Who Crashed Normal People's Weddings

John Travolta awesomely crashed a wedding last week, showing up (clad in a T-shirt, jeans, and a baseball cap) in the couple's wedding photos after meeting them at a bar the night before. He's not the first celebrity to do so ... in fact, it's not even the first time he did it himself. Time, the Huffington Post, and E! round up 14 more famous wedding crashers:

• Travolta and Robin Williams crashed a reception that was going on next door to a bar they were at, back in 1977, and started dancing. Recalls Williams, "Some guy yelled out, 'Hey, they really are Mork and Vinnie Barbarino!'"
• When Justin Bieber and Selena Gomez heard a Bieber song being played at a wedding in Malibu, they dropped in. Needless to say, shrieking ensued.
• A bridesmaid tweeted Conan O'Brien when she found out he was staying at the hotel where her friends' reception was being held—and he actually showed up.

• Not only did guests at a Manchester wedding get Meryl Streep as a surprise guest, they got Meryl Streep dressed as Margaret Thatcher. She had been filming The Iron Lady at the Town Hall when the bride walked in; Thatcher and other cast members applauded, and she even gave the happy couple some wedding gifts.

Click for the full lists from Time, the Huffington Post, or E!. (More John Travolta stories.)