Wedding Crashers is a 2005 comedy film, directed by David Dobkin. The film stars Owen Wilson and Vince Vaughn.

Wilson and Vaughn play two men who "crash" wedding parties to meet women. Their freewheeling fun ends when Wilson's character falls in love with a bridesmaid (Rachel McAdams), who happens to be the daughter of the U.S. Treasury Secretary (Christopher Walken). The film is also another entry in the frat pack series of movies that feature some combination of Jack Black, Luke Wilson, Ben Stiller, Will Ferrell, Vince Vaughn, and Owen Wilson.

The film was written by Steve Faber and Bob Fisher and was produced through New Line Cinema. With filming on location in Washington, D.C. and Maryland's Eastern Shore, it was released in the United States on July 15, 2005.

The film's website sparked controversy for offering a printable Purple Heart that it encouraged men to wear in order to impress women. The site managers removed the fake medal after complaints from veterans' groups.

The movie was released in mid-July 2005 and became an immediate hit, grossing $33 million in its first weekend. It was also very well received by critics, who admired the natural chemistry between Wilson and Vaughn, comparing them in some instances to Paul Newman and Robert Redford in Butch Cassidy and the Sundance Kid (the comparisons might have been inspired by the very similar carefree bike-riding scenes found in both movies). The film also had extremely long legs, and grossed over $209 million after staying in the theaters for more than half a year. Most movies that made around $33 million in their opening weekend only managed about $100 million this year. It is currently on track to become the fifth highest-grossing movie of the year so far, an astounding level of success not expected by the studio considering its modest budget ($40 million) and competition with heavily advertised blockbusters during the summer season.