The 9th Guest: Reparto
Donald Cook
Jim Daley
Genevieve Tobin
Jean Trent
Hardie Albright
Henry Abbott
Edward Ellis
Tim Cronin
Edwin Maxwell
Jason Osgood
Vince Barnett
William Jones
Helen Flint
Sylvia Inglesby
Samuel S. Hinds
Dr. Murray Reid
Nella Walker
Margaret Chisholm
Sidney Bracey
Hawkins
Mildred Gover
Jean's Maid (Uncredited)
Arthur Hoyt
Osgood's Secretary (Uncredited)
Mary MacLaren
First Telegraph Office Worker (Uncredited)
Billie Seward
Office Worker (Uncredited)
Gayne Whitman
Voice of the Host (Uncredited)
Charles C. Wilson
Burke (Uncredited)