iris rainer dart (born 1944) is an american author and playwright for television and the stage. her most notable novel is "beaches", which was made into a 1988 film of the same name. she has also written several stage musicals as well as for television shows, such as "the sonny and cher show". she also voiced donna, peter cottontail's love interest, in the stop-motion easter classic, here comes peter cottontail.