Who Knew These Celebrities Were Republican? (PHOTOS)

The hilarious Vince Vaughn even has trouble convincing his own party he’s a Republican. Back in 2004, Owen Wilson told USA Today that they tried to attend a party for Young Republicans while filming Wedding Crashers, but the other attendees didn’t believe Vince was actually conservative. "They saw me and said, 'Come on in.' But to Vince, they said, 'We know YOU'RE not a Republican.'"

Vince scored a private tour of the White House — and a meeting with President Bush — soon after. No big deal.