William Powell

Philo Vance

James Hall

Jimmie Spottswoode

Louise Brooks

The Canary

Jean Arthur

Alice LaFosse

Lawrence Grant

John Cleaver

Gustav von Seyffertitz

Dr. Ambrose Lindquist

E.H. Calvert

District Attorney Markham (as Captain E. H. Calvert)

Eugene Pallette

Sergeant Heath

Ned Sparks

Tony Skeel

Louis John Bartels

Louis Mannix

Margaret Livingston

Body Double for Louise Brooks (uncredited)

Oscar Smith

Stuttering Hallboy (uncredited)