UFC 83: Serra vs St-Pierre 2 was a mixed martial arts event held by the Ultimate Fighting Championship. The event was held on April 19, 2008, at the Bell Centre in Montreal, Quebec, Canada. UFC 83 was the UFC's first event in Canada. The event on this date was originally scheduled to be called UFC 84, but following the cancellation of a tentatively scheduled March 8, 2008 event in England, the event's title was changed to UFC 83 instead. It was headlined by UFC Welterweight Champion Matt Serra and UFC Interim Welterweight Champion Georges St. Pierre in a match to decide the undisputed champion. Several prominent Canadian fighters were set to compete, including Kalib Starnes, Mark Bocek, Jason MacDonald, Sam Stout, and Jonathan Goulet. Patrick Côté was scheduled to fight as well, but was forced to pull out after sustaining an injury in a slip-and-fall accident.