When in Rome is a 1952 American comedy drama film directed by Clarence Brown and starring Van Johnson, Paul Douglas, and Joseph Calleia. The film was released by Metro-Goldwyn-Mayer, and was based on a story by Robert Buckner, Dorothy Kingsley, and Charles Schnee. The picture opens with the following text: ”1950 was a Holy Year. Three million pilgrims from every part of the world thronged to Rome, the Eternal City. Our story is about two men who journeyed to Rome that year. One was Father John X. Halligan, a young priest from Coaltown, Pennsylvania, whose mission was a holy one. The other was Joe Brewster, late of Sing Sing, San Quentin, Joliet and Atlanta, whose mission was not so holy. If our story has a moral, it’s a simple one. God may move in mysterious ways, but He gets there just the same.”

William H. Daniels ASC was a film cinematographer who was Greta Garbo's personal lensman, serving as the cinematographer for such Garbo-starring films as Torrent (1926), The Mysterious Lady (1928), The Kiss (1929), Anna Christie, Romance, Grand Hotel (1932), Anna Karenina (1935), and Camille (1936). Early in his career he worked regularly with director Erich von Stroheim, providing cinematography for such films as The Devil's Pass Key (1920) and Greed (1924). Daniels went on to win an Academy Award for Best Cinematography for his work on The Naked City (1948).