The Ninth Guest, sometimes abbreviated as The 9th Guest, is a 1934 American pre-Code horror mystery film directed by Roy William Neill and starring Donald Cook and Genevieve Tobin.

Plot

A group of guests are invited by telegram to a party at a New Orleans penthouse by an anonymous caller. Among them are professor Murray Reid, campus radical Henry Abbott and his love interest Jean Trent, mob boss Jason Osgood, attorney Sylvia Inglesby, District Attorney Timothy Cronin, socialite Margaret Chisholm, and writer James Daley.