After "George Washington Slept Here" (1940), Kaufman and Hart called it quits. Hart continued to write plays after parting with Kaufman, such as "Christopher Blake" (1946) and "Light Up the Sky" (1948), as well as the book for the musical "Lady In The Dark" (1941), with songs by Kurt Weill and Ira Gershwin. However, he became best known during this period as a director. Among the Broadway hits he staged were "Junior Miss" (1941), "Dear Ruth" (1944) and "Anniversary Waltz" (1954). By far his biggest hit was the musical "My Fair Lady" (1956), adapted from George Bernard Shaw's "Pygmalion", with book and lyrics by Alan Jay Lerner and music by Frederick Loewe. The show ran over six years and won a Tony Award for Best Musical. Hart picked up the Tony for Best Director.