After the merger was completed, Zanuck signed young actors to help carry 20th Century-Fox: Tyrone Power, Linda Darnell, Carmen Miranda, Don Ameche, Henry Fonda, Gene Tierney, Sonja Henie, and Betty Grable. Fox also hired Alice Faye and Shirley Temple, who appeared in several major films for the studio in the 1930s. Higher attendance during World War II helped Fox overtake RKO and Metro-Goldwyn-Mayer to become the third most profitable film studio. In 1941, Zanuck was commissioned as a lieutenant colonel in the U. S. Signal Corps and assigned to supervise production of U. S. Army training films. His partner, William Goetz, filled in at Fox.