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. It was headlined by UFC Welterweight Champion Matt Serra and UFC Interim Welterweight Champion Georges St. Pierre in a match to unify the championship.
| Actor | Role |
|---|---|
 Georges St-PierreSelf | Self |
 Matt SerraSelf | Self |
 Rich FranklinSelf | Self |
 Travis LutterSelf | Self |
 Nate QuarrySelf | Self |
 Kalib StarnesSelf | Self |
 Michael BispingSelf | Self |
| CCharles McCarthySelf | Self |
 Mac DanzigSelf | Self |
 Mark BocekSelf | Self |
 Jason William DaySelf | Self |
 Alan BelcherSelf | Self |
 Jason MacDonaldSelf | Self |
 Joe DoerksenSelf | Self |
 Demian MaiaSelf | Self |
 Ed HermanSelf | Self |
 Rich ClementiSelf | Self |
 Sam StoutSelf | Self |
 Cain VelasquezSelf | Self |
| BBrad MorrisSelf | Self |
 Jonathan GouletSelf | Self |
| KKuniyoshi HironakaSelf | Self |