Ray Bolger demanded that the producers expand his role, then several rewrites later, de Mille herself was fired and replaced by Burt Shevelove (an American musical theater playwright); but only a few days after that, Shevelove exited.
Agnes George de Mille (September 18, 1905  October 7, 1993) was an American dancer and choreographer. Agnes de Mille was born in New York City into a well-connected family of theater professionals. Burt Shevelove (September 19, 1915  April 8, 1982) was an American musical theater playwright, lyricist, librettist, and director. 
