Jack Buetel as Billy the Kid

Jane Russell as Rio McDonald

Thomas Mitchell as Pat Garrett

Walter Huston as Doc Holliday

Mimi Aguglia as Guadalupe

Joe Sawyer as Charley Woodruff

Gene Rizzi as Stranger

Bobby Callahan as Boy (uncredited)

Martín Garralaga as Mike the Waiter (uncredited)

Ben Johnson as Deputy (uncredited)

Dickie Jones as Boy (uncredited)

Cecil Kellogg as Deputy (uncredited)

Ethan Laidlaw as Deputy (uncredited)

Ted Mapes as Deputy (uncredited)

William Newell as Drunken Cowboy (uncredited)

Emory Parnell as Dolan (uncredited)

Edward Peil Sr. as Swanson (uncredited)

Wallace Reid Jr. as Townsman (uncredited)

Julian Rivero as Pablo (uncredited)

Lee Shumway as Card Dealer (uncredited)

William Steele as Deputy (uncredited)

Harry Strang as Townsman at Sheriff's Office (uncredited)

Frank Ward as Boy (uncredited)

Pat West as Bartender (uncredited)