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