The life and work of the enigmatic singer-songwriter Harry Nilsson.
| Actor | Role |
|---|---|
| HHarry NilssonSelf - Narrator (archive footage) | Self - Narrator (archive footage) |
| RRichard PerrySelf | Self |
| DDoug HoeferSelf | Self |
 Jimmy WebbSelf | Self |
 Micky DolenzSelf | Self |
 Van Dyke ParksSelf | Self |
| UUna NilssonSelf | Self |
 John LennonSelf (archive footage) | Self (archive footage) |
 Randy NewmanSelf | Self |
 Mark HudsonSelf | Self |
 Ringo StarrSelf (archive footage) | Self (archive footage) |
 Yoko OnoSelf | Self |
 Tom SmothersSelf | Self |
 Dick SmothersSelf | Self |
 Terry GilliamSelf | Self |
 Robin WilliamsSelf | Self |