Professor Echo / Grandma O'Grady
Lon Chaney
Rosie O'Grady
Lila Lee
Second Siamese Twin (uncredited)
Linda Parker
Sailor at Sideshow (uncredited)
Ray Cooke
Outside Sideshow Barker (uncredited)
Jack Baxley
Hector McDonald
Elliott Nugent
Tweedledee aka Willie 'Midget'
Harry Earles
Prosecuting Attorney
John Miljan
Hercules
Ivan Linow
Regan
Clarence Burton
Defense Attorney
Crauford Kent
Lady Customer (uncredited)
Trixie Friganza
First Siamese Twin (uncredited)
Cecilia Parker
Producer
Irving Thalberg
Writer
Makeup Artist
Director
Jack Conway
J. C. Nugent
Still Photographer
George Hurrell Sr.