In his autobiography, Capra recalled, "Of all actors' roles I believe the most difficult is the role of a Good Sam who doesn't know that he is a Good Sam. I knew one man who could play it ... James Stewart. ... I spoke to Lew Wasserman, the MCA agent who handled Jimmy, told him I wanted to tell Jimmy the story. Wasserman said Stewart would gladly play the part without hearing the story." Stewart and Capra had previously collaborated on "You Can't Take It with You" (1938) and "Mr. Smith Goes to Washington" (1939).