He was underdressed for the part, but John Travolta made a welcome cameo at the Georgia wedding last week. As a friend of the groom revealed on Reddit, the 59-year-old actor met the engaged couple at a bar the night before their ceremony and he showed up the next day—in a T-shirt, jeans, and baseball cap—and for photos. And it’s not the first time the Grease star has slipped into a wedding uninvited. In 2009, Robin Williams confessed to USA Today that back in 1977, he and Travolta crashed a reception next to a bar they were in. But once Travolta stepped on to the dance floor dancing, the guests realized the actors were not Welcome Back, Kotter and Mork & Mindy impersonators “They figured out who we were,” Williams said. “Some guy yelled out, ‘Hey, they really are Mork and Vinnie Barbarino!'”