UFC 81: Breaking Point was a mixed martial arts (MMA) event held by the Ultimate Fighting Championship (UFC) at the Mandalay Bay Events Center in Las Vegas, Nevada. The event featured Tim Sylvia and Antonio Rodrigo "Minotauro" Nogueira for UFC's Interim World Heavyweight Championship.
| Actor | Role |
|---|---|
 Antonio Rodrigo NogueiraSelf | Self |
 Tim SylviaSelf | Self |
 Frank MirSelf | Self |
 Brock LesnarSelf | Self |
 Nate MarquardtSelf | Self |
 Jeremy HornSelf | Self |
 Ricardo AlmeidaSelf | Self |
| RRob YundtSelf | Self |
 Tyson GriffinSelf | Self |
 Gleison TibauSelf | Self |
 Chris LytleSelf | Self |
| KKyle BradleySelf | Self |
| MMarvin EastmanSelf | Self |
| TTerry MartinSelf | Self |
| TTim BoetschSelf | Self |
| DDavid HeathSelf | Self |
 Robert EmersonSelf | Self |
| KKeita NakamuraSelf | Self |