Lon Chaney

Professor Echo / Granny O'Grady

Mae Busch

Rosie O'Grady

Matt Moore

Hector McDonald

Victor McLaglen

Hercules

Harry Earles

Tweedledee aka Little Willie

Matthew Betz

Detective Regan

Edward Connelly

Judge

William Humphrey

Attorney for Defense

E. Alyn Warren

Prosecuting Attorney

Carrie Daumery

Pet Shop Customer (uncredited)

Mickey McBan

Boy Watching Hercules' Act (uncredited)

Wilmuth Merkyl

Jeweler (uncredited)

Louis Morrison

Police Commissioner (uncredited)