 James GleasonPolice Insp. Oscar Piper | Police Insp. Oscar Piper |
 Zasu PittsHildegarde Withers | Hildegarde Withers |
 Marjorie LordJune Preston | June Preston |
| GGeorge ShelleyBert | Bert |
 Joan WoodburyRita Marlowe | Rita Marlowe |
 Frank M. ThomasJeff "Pops" Plummer | Jeff "Pops" Plummer |
 Tom KennedyDetective Casey | Detective Casey |
 Alan EdwardsRicky Rickman | Ricky Rickman |
 Stephen ChaseTommy Washburn (as Alden Chase) | Tommy Washburn (as Alden Chase) |
 Eddie MarrWindy Bennett | Windy Bennett |
| AAda LeonardLil | Lil |
 Barbara PepperAlice | Alice |
 Eddie BordenStage Board Man (uncredited) | Stage Board Man (uncredited) |
 Lynton BrentTicket Taker (uncredited) | Ticket Taker (uncredited) |
| WWilliam CorsonMan Watching Piper Enter Theater | Man Watching Piper Enter Theater |
 Sayre DearingMan in Audience (uncredited) | Man in Audience (uncredited) |
 Bud JamisonTheatre Doorman (uncredited) | Theatre Doorman (uncredited) |
 Donald KerrCall Boy (uncredited) | Call Boy (uncredited) |
 Edward LeSaintCoroner (uncredited) | Coroner (uncredited) |
 Carl M. LevinessMan in Audience (uncredited) | Man in Audience (uncredited) |
 Robert McKenzieMax, Backstage Doorman (uncredited) | Max, Backstage Doorman (uncredited) |
 Frank O'ConnorStage Manager (uncredited) | Stage Manager (uncredited) |
 Elizabeth RussellWoman Watching Piper Enter Theater (uncredited) | Woman Watching Piper Enter Theater (uncredited) |
 Larry SteersMan in Audience (uncredited) | Man in Audience (uncredited) |
