The title is from the musical Ain't Misbehavin' with a book by Murray Horwitz and Richard Maltby, Jr., and music by Thomas Wright "Fats" Waller. The original Broadway production of "Ain't Misbehavin'" opened at the Longacre Theater in New York on May 9, 1978, ran for 1604 performances and won the 1978 Tony Award (New York City) for the Best Musical. Nell Carter (Winner of the 1978 Tony Award Best Featured Actress in a Musical).