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?
The Youngest Profession:  It contains cameos by Greer Garson, Lana Turner, William Powell, Walter Pidgeon, and Robert Taylor. William Powell: William Horatio Powell (July 29, 1892 – March 5, 1984) was an American actor.
William Powell