John Travolta and Robin Williams were once mistaken for celebrity impersonators when they crashed a wedding in the 1970s.
Back in 1977, the actors were enjoying a drink in a restaurant in Santa Barbara, California when they decided to invade a nearby wedding reception - and the guests were convinced the pair was actually lookalikes.
Travolta tells USA Today, "We were having fun, starting to relax, when we saw there was a wedding next door. We figured we'd crash it."
And the duo, who've teamed up on the big screen for 2009 comedy Old Dogs, nearly got away with crashing the party - until Travolta hit the dance floor.
Williams admits the revellers soon recognised them as the real stars from their hit TV shows, Mork & Mindy and Welcome Back, Kotter.
He adds, "They figured out who we were. Some guy yelled out, 'Hey, they really are Mork and Vinnie Barbarino!'"