UFC on FX 2: Alves vs. Kampmann was a mixed martial arts event held live by the Ultimate Fighting Championship on Saturday March 3, 2012 at the Allphones Arena in Sydney, Australia. The event also made history by playing host the first ever flyweight fights in UFC history as part of the semifinals for the Flyweight Tournament, the winner of which would be crowned the inaugural UFC Flyweight Champion.
| Actor | Role |
|---|---|
 Martin KampmannSelf | Self |
 Thiago AlvesSelf | Self |
 Joseph BenavidezSelf | Self |
| YYasuhiro UrushitaniSelf | Self |
 Demetrious JohnsonSelf | Self |
 Ian McCallSelf | Self |
 Costas PhilippouSelf | Self |
 Court McGeeSelf | Self |
 James Te HunaSelf | Self |
| AAaron RosaSelf | Self |
 Anthony PeroshSelf | Self |
| NNick PennerSelf | Self |
 Steven SilerSelf | Self |
 Cole MillerSelf | Self |
 Andrew CraigSelf | Self |
| KKyle NokeSelf | Self |
 TJ WaldburgerSelf | Self |
| JJake HechtSelf | Self |
 Daniel PinedaSelf | Self |
 Mackens SemerzierSelf | Self |
 Shawn JordanSelf | Self |
| OOli ThompsonSelf | Self |