Claim: 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.
Evidence: 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.