Kerr was the author of the acclaimed collection of stories Please do not Eat the Daisies", which later became a hit feature film of 1960 starring Doris Day and David Niven, and later also became a sitcom of the same name in the 1960s.Additionally, Kerr authored the hit play Mary, Mary, which was one of the longest-running Broadway comedies, with such stars as Debbie Reynolds, running with over 1