A Moon for the Misbegotten is a play by Eugene O'Neill. The play is a sequel to O'Neill's Long Day's Journey into Night, with the Jim Tyrone character as an older version of Jamie Tyrone. He began drafting the play late in 1941, set it aside after a few months and returned to it a year later, completing the text in 1943 - his final work, as his failing health made it physically impossible for him to write.The play premiered on Broadway in 1947 and has had four Broadway revivals, plus a West End engagement.