1934, Jagger signed a contract with Paramount, for which he made You Belong to Me (1934) with Lee Tracy, then College Rhythm (1934) with Jack Oakie, Behold My Wife! (1934) with Sylvia Sidney, Wings in the Dark (1935) with Myrna Loy and Cary Grant, Home on the Range (1935) with Jackie Coogan, Randolph Scott and Evelyn Brent, Car 99 (1935) with Fred MacMurray and Ann Sheridan, People Will Talk (1935) with Charlie Ruggles, and Men Without Names (1935) with Fred MacMurray. Paramount gave him a lead role in the B Western Wanderer of the Wasteland (1935). He was back in supporting parts in It's a Great Life (1935), Woman Trap (1936), and 13 Hours by Air (1936). Victor Halperin borrowed him to play the lead role in Revolt of the Zombies (1936). He went to 20th Century Fox for Pepper (1936) and Star for a Night (1936), then to MGM for Under Cover of Night (1937). Jagger did Woman in Distress (1937) at Columbia, and Dangerous Number (1937) and Song of the City (1937) at MGM. Jagger appeared in Republic Pictures' Escape by Night (1937) and Exiled to Shanghai (1937). Jagger played Michael Drops In in summer stock and returned to Broadway to star in Missouri Legend (1938), which ran 48 performances. He was also in short runs for Everywhere I Roam (1938–39), Brown Danube (1939), Farm of Three Echoes (1939–40) with Ethel Barrymore, and Unconquered (1940) by Ayn Rand. Brigham Young Jagger made his breakthrough with his portrayal of Mormon leader Brigham Young in Brigham Young (1940) at 20th Century Fox, alongside Tyrone Power for director Henry Hathaway. He was cast on the basis of his performance in Missouri Legend. According to George D. Pyper, a technical consultant on the film who had personally known Brigham Young, Jagger not only resembled Young, but he also spoke like him and had many of his mannerisms. Thirty-two years later, in 1972 he was baptized a member of the Church of Jesus Christ of Latter-day Saints. Fox signed him to a long-term contract and put him in Western Union (1941) for Fritz Lang. He was announced for the Biblical film The Great Commandment and a biopic of Lewis and Clark with Randolph Scott, but neither was made. Instead, Jagger appeared in The Men in Her Life (1941) for Columbia, Valley of the Sun (1942) at RKO, and The Omaha Trail (1942) at