UFC 42: Sudden Impact was a mixed martial arts event held by the Ultimate Fighting Championship at the American Airlines Arena in Miami, Florida. UFC 42 was the first UFC event to take place in Florida. Headlining the event was a Welterweight Title bout between Matt Hughes and Sean Sherk. UFC 42 also marked the first UFC appearance of future Middleweight Champion Rich Franklin.
| Actor | Role |
|---|---|
 Matt HughesSelf | Self |
 Sean SherkSelf | Self |
 Pete SprattSelf | Self |
 Robbie LawlerSelf | Self |
| DDave StrasserSelf | Self |
| RRomie AramSelf | Self |
| WWesley CorreiraSelf | Self |
| SSean AlvarezSelf | Self |
 Rich FranklinSelf | Self |
 Evan TannerSelf | Self |
 Duane LudwigSelf | Self |
 Genki SudoSelf | Self |
 Hermes FrancaSelf | Self |
 Richard CrunkiltonSelf | Self |
 David LoiseauSelf | Self |
 Mark WeirSelf | Self |