Edna May Oliver as Hildegarde Withers

James Gleason as Inspector Oscar Piper

Lola Lane as Phyllis La Font

George Meeker as Tom Kelsey, alias Roswell T. Forrest

Dorothy Libaire as Kay Deving

Harry Ellerbe as Marvin Deving

Chick Chandler as Dick French

Willie Best as Willie (as Sleep 'n' Eat)

Leo G. Carroll as Joseph B. Tate

DeWitt Jennings as Captain Beegle

Spencer Charters as Chief of Police Britt

Arthur Hoyt as Dr. O'Rourke

Matt McHugh as Madden

Morgan Wallace as McArthur aka Arthur Mack

Brooks Benedict as Roswell T. Forrest

Irving Bacon as Man with Pelican (uncredited)