The Youngest Profession is a 1943 film, directed by Edward Buzzell, it contains cameos by which American actor, and a major star at Metro-Goldwyn-Mayer?
William Powell William Horatio Powell (July 29, 1892 – March 5, 1984) was an American actor. A major star at Metro-Goldwyn-Mayer, he was paired with Myrna Loy in 14 films, including the "Thin Man" series based on the Nick and Nora Charles characters created by Dashiell Hammett. Powell was nominated for the Academy Award for Best Actor three times: for "The Thin Man" (1934), "My Man Godfrey" (1936), and "Life with Father" (1947).
Pat O'Brien (actor) William Joseph Patrick "Pat" O'Brien (November 11, 1899 – October 15, 1983) was an American film actor with more than one hundred screen credits. Of Irish descent, he often played Irish and Irish-American characters and was referred to as "Hollywood's Irishman in Residence" in the press. One of the best-known screen actors of the 1930s and 1940s, he played priests, cops, military figures, pilots, and reporters. He is especially well-remembered for his roles in "Knute Rockne, All American" (1940), "Angels with Dirty Faces" (1938), and "Some Like It Hot" (1959). He was frequently paired onscreen with Hollywood legend James Cagney. O'Brien also appeared on stage and television.