 Warren BeattyHarley Rummel | Harley Rummel |
 Leslie CaronMichele O'Brien | Michele O'Brien |
 Robert CummingsDr. Philip Brock | Dr. Philip Brock |
 Keenan WynnAngelo Carelli | Angelo Carelli |
 Lionel StanderSam | Sam |
| AAsa MaynorRusty | Rusty |
 Cathleen NesbittMrs. Brock | Mrs. Brock |
| MMichael BradleyJohn Thomas | John Thomas |
 Warren MitchellFrank Focus / Panel Moderator | Frank Focus / Panel Moderator |
 Sydney TaflerPanel Participant | Panel Participant |
 Michael KaneStaff Doctor | Staff Doctor |
| RRiggs O'HaraGlue Sniffer | Glue Sniffer |
 Mavis VilliersRusty's Mother | Rusty's Mother |
 Margaret NolanMail-Order Film Girl | Mail-Order Film Girl |
 Viviane VenturaMail-Order Film Girl | Mail-Order Film Girl |
 George MoonNeighbour | Neighbour |
| CCharlotte HollandNeighbour | Neighbour |
 Ferdy MayneVittorio Fettucini | Vittorio Fettucini |
| LLibby MorrisClinic Mother | Clinic Mother |
 Bessie LovePet Shop Customer | Pet Shop Customer |
 Jill AdamsMrs. B.M. von Crispin | Mrs. B.M. von Crispin |
 Donald SutherlandAutograph Seeking Father (uncredited) | Autograph Seeking Father (uncredited) |
 Jo Anne WorleyAutograph Seeking Mother (uncredited) | Autograph Seeking Mother (uncredited) |
 Anita Sharp-BolsterMrs. Egan (uncredited) | Mrs. Egan (uncredited) |
| CChuck JulianGrocery Clerk (uncredited) | Grocery Clerk (uncredited) |
| VVera GouletNurse (uncredited) | Nurse (uncredited) |
 Michael ChaplinHeathcliff – Beatnik (uncredited) | Heathcliff – Beatnik (uncredited) |
| PPauline ChamberlainWoman in Audience (uncredited) | Woman in Audience (uncredited) |
