For the ventriloquist Gabbo his wooden dummy Otto is the only means of expression. When he starts relying more and more on Otto, he starts going mad.
| Actor | Role |
|---|---|
 Erich von StroheimGabbo | Gabbo |
 Betty CompsonMary | Mary |
 Donald DouglasFrank | Frank |
 Marjorie KaneBabe | Babe |
 Earl BurtnettOrchestra Leader | Orchestra Leader |
| GGeorge GrandeeOtto (voice) (uncredited) | Otto (voice) (uncredited) |
| BBo Peep KarlinDancer (uncredited) | Dancer (uncredited) |
 Rosina LawrenceDancer (uncredited) | Dancer (uncredited) |
 Eddy WallerVaudevillian (uncredited) | Vaudevillian (uncredited) |