A funny, intimate and heartbreaking portrait of one of the world’s most beloved and inventive comedians, Robin Williams, told largely through his own words. Celebrates what he brought to comedy and to the culture at large, from the wild days of late-1970s L.A. to his death in 2014.
| Actor | Role |
|---|---|
 Robin WilliamsSelf (voice and archive footage) | Self (voice and archive footage) |
| MMark RasmussenSelf | Self |
| SStan WilsonSelf | Self |
| VValerie VelardiSelf | Self |
 David LettermanSelf | Self |
| BBennett TramerSelf | Self |
| MMcLaurin Smith-WilliamsSelf | Self |
| FFrankie WilliamsSelf | Self |
 Elayne BooslerSelf | Self |
 Scott MarshallSelf | Self |
 Pam DawberSelf | Self |
 Howard StormSelf | Self |
 Eric IdleSelf | Self |
| SStu SmileySelf | Self |
| AArthur GraceSelf | Self |
 David SteinbergSelf | Self |
 Billy CrystalSelf | Self |
 Zak WilliamsSelf | Self |
 Steve MartinSelf | Self |
 Mark RomanekSelf | Self |
| CCheri MinnsSelf | Self |
 Lewis BlackSelf | Self |
 David SteinbergSelf - manager | Self - manager |