Ray Milland as Stanford White

Joan Collins as Evelyn Nesbit Thaw

Farley Granger as Harry Kendall Thaw

Luther Adler as Delphin Delmas

Cornelia Otis Skinner as Mrs. Thaw

Glenda Farrell as Mrs. Nesbit

Frances Fuller as Mrs. Elizabeth White

Phillip Reed as Robert Collier

Gale Robbins as Gwen Arden

James Lorimer as McCaleb

John Hoyt as William Travers Jerome

Robert F. Simon as Stage Manager (as Robert Simon)

Harvey Stephens as Dr. Hollingshead DDS

Emile Meyer as Hunchbacher

Henry Kulky as Prisoner (uncredited)

Richard Travis as Charles Dana Gibson (uncredited)

Edna Holland as Sales Clerk at Lord & Taylor (uncredited)

Suzanne Alexander as Floradora Girl (uncredited)

Helen Van Tuyl as Mrs. Jennings (uncredited)

Gordon Carveth as Juror (uncredited)

Edith Evanson as Josie (uncredited)

William Forrest as Simpson (uncredited)

Kit Guard as Backstage Policeman (uncredited)

Ruta Lee as Tennis Girl (uncredited)

Ainslie Pryor as Sport Donnelly (uncredited)

Ivan Triesault as Ludwig (uncredited)

Art Felix as Waiter (uncredited)

Diane DuBois as Floradora Girl (uncredited)

Raymond Bailey as Judge Fitzgerald (uncredited)

Robert Adler as Driver (uncredited)

Carol Kelly as Margaret (uncredited)