In 1963, Wilder was cast in a leading role in Mother Courage and Her Children, a production starring Anne Bancroft, who introduced Wilder to her boyfriend (and later husband) Mel Brooks. A few months later, Brooks mentioned that he was working on a screenplay called Springtime for Hitler, for which he thought Wilder would be perfect in the role of Leo Bloom. Brooks elicited a promise from Wilder that he would check with him before making any long-term commitments. Months went by, and Wilder toured the country with different theatre productions, participated in a televised CBS presentation of Death of a Salesman, and was cast for his first role in a film—a minor role in Arthur Penn's 1967 Bonnie and Clyde. After three years of not hearing from Brooks, Wilder was called for a reading with Zero Mostel, who was to be the star of Springtime for Hitler and had approval of his co-star. Mostel approved, and Wilder was cast for his first leading role in a feature film, 1967's The Producers.