He, Ryan, and the Andrews Sisters were in "Private Buckaroo" (1942) and "Give Out, Sisters" (1942); then he was co-starred opposite Universal's teenage singing star Gloria Jean in four films: "Get Hep to Love" (1942), "When Johnny Comes Marching Home" (1943), "It Comes Up Love" (1943), and "School for Jive", which showed O'Connor to such good advantage that he became the focal point of the film, retitled "Mister Big" (1943). Universal added $50,000 to the budget and elevated the "B" movie to "A" status.