Joel McCrea
William Thomas Green Morton
Betty Field
Elizabeth Morton
Harry Carey
Professor John C. Warren
William Demarest
Eben Frost
Louis Jean Heydt
Dr. Horace Wells
Julius Tannen
Dr. Charles T. Jackson
Edwin Maxwell
Vice-President of Medical Society
Porter Hall
President Franklin Pierce
Franklin Pangborn
Dr. Heywood
Grady Sutton
Homer Quimby
Harry Hayden
Judge Shipman
Torben Meyer
Dr. Dahlmeyer
Victor Potel
First Dental Patient
Thurston Hall
Senator Borland
J. Farrell MacDonald
The Priest
Roscoe Ates
Morton's Sign Painter - replaced by Hank Worden (uncredited)
Hank Bell
Onlooker (uncredited)
Franklyn Farnum
Massachusetts Medical Society Man (uncredited)
Byron Foulger
Morton's Clinic Manager (uncredited)
Hank Worden
Morton's Sign Painter - replaced Roscoe Ates (uncredited)
Arthur Hoyt
Presidential Secretary (uncredited)
Donivee Lee
Betty Morton
