UFC 61: Bitter Rivals was a mixed martial arts event held by the Ultimate Fighting Championship on Saturday, July 8, 2006. The main event was a Heavyweight Championship match between champion Tim Sylvia and former champion Andrei Arlovski. The co-main event was the highly anticipated re-match of TUF 3 coaches Tito Ortiz and Ken Shamrock.
| Actor | Role |
|---|---|
 Tim SylviaSelf | Self |
 Andrei ArlovskiSelf | Self |
 Josh BurkmanSelf | Self |
 Josh NeerSelf | Self |
 Tito OrtizSelf | Self |
 Ken KilpatrickSelf | Self |
 Frank MirSelf | Self |
| DDan ChristisonSelf | Self |
 Joe StevensonSelf | Self |
| YYves EdwardsSelf | Self |
 Hermes FrancaSelf | Self |
| JJoe JordanSelf | Self |
 Jeff MonsonSelf | Self |
 Anthony PeroshSelf | Self |
| GGilbert AldanaSelf | Self |
 Cheick KongoSelf | Self |
| DDrew FickettSelf | Self |
 Kurt PellegrinoSelf | Self |