Gary Cooper as Howard Roark

Patricia Neal as Dominique Francon

Raymond Massey as Gail Wynand

Kent Smith as Peter Keating

Robert Douglas as Elsworth Toohey

Henry Hull as Henry Cameron

Ray Collins as Roger Enright

Moroni Olsen as Chairman

Jerome Cowan as Alvah Scarret

Bob Alden as Newsboy (uncredited)

John Alvin as Young Intellectual (uncredited)

Morris Ankrum as Prosecutor (uncredited)

Lois Austin as Female Party Guest (uncredited)

Griff Barnett as Judge (uncredited)

Monte Blue as Gas Station Executive (uncredited)

Gail Bonney as Woman (uncredited)

Ralph Brooks as Courtroom Spectator (uncredited)

Glen Cavender as Pedestrian Onlooker (uncredited)

Dorothy Christy as Society Woman (uncredited)

Tris Coffin as Toohey's Secretary (uncredited)

Tom Coleman as Court Clerk (uncredited)

G. Pat Collins as Jury Foreman (uncredited)

James Conaty as Party Guest (uncredited)

Bill Dagwell as Banner Shipping Clerk (uncredited)

Ann Doran as Wynand's Secretary (uncredited)

Lester Dorr as Minor Role (uncredited)

John Doucette as Gus Webb (uncredited)

Jay Eaton as Party Guest (uncredited)

Estelle Etterre as Woman at Enright party (uncredited)

Charles Evans as Banner Board Member (uncredited)

Raoul Freeman as Juror (uncredited)

Roy Gordon as Vice-President (uncredited)

William Haade as Worker (uncredited)

Creighton Hale as Court Clerk (uncredited)

Jonathan Hale as Guy Francon (uncredited)

Thurston Hall as Businessman at Party (uncredited)

Sam Harris as Board Member / Courtroom Spectator (uncredited)

Paul Harvey as Opera Businessman (uncredited)

Henry Hebert as Juror (uncredited)

Russell Hicks as Banner Board Member (uncredited)

Bert Howard as Board Member (uncredited)

Selmer Jackson as Cortlandt Official (uncredited)

Fred Kelsey as Old Watchman (uncredited)

Douglas Kennedy as Reporter (uncredited)

Raymond Largay as Director (uncredited)

Philo McCullough as Bailiff (uncredited)

Harold Miller as Party Guest (uncredited)

Boyd 'Red' Morgan as Jury Member (uncredited)

Jack Mower as Construction Foreman (uncredited)

Paul Newlan as Policeman (uncredited)

Albert Petit as Board Member (uncredited)

Lee Phelps as Juror (uncredited)

Bob Reeves as Juror (uncredited)

Almira Sessions as Dominique's Housekeeper at Quarry (uncredited)

George Sherwood as Policeman (uncredited)

Paul Stanton as Dean Who Expels Roark (uncredited)

Larry Steers as Party Guest (uncredited)

Ruthelma Stevens as Roark's Secretary (uncredited)

Charles Trowbridge as Director (uncredited)

Tito Vuolo as Pasquale Orsini (uncredited)

Geraldine Wall as Woman (uncredited)

Harlan Warde as Young Man (uncredited)

Pierre Watkin as Cortlandt Official (uncredited)

Leo White as Pedestrian Onlooker (uncredited)

Josephine Whittell as Hostess (uncredited)

Frank Wilcox as Gordon Prescott (uncredited)

Isabel Withers as Secretary (uncredited)

Harry Woods as Quarry Superintendent (uncredited)

John Alban as Courtroom Spectator (uncredited)

George Blagoi as Rally Spectator (uncredited)

James Carlisle as Party Guest (uncredited)

Charles Fogel as Courtroom Spectator (uncredited)

Herschel Graham as Reporter (uncredited)