She was 50 when she was cast in Nine, which was based on Fellini’s movie 8 1/2. “The role of the movie producer had been written for a man, but the character was reworked so Ms. Montevecchi, who didn’t fit anywhere else in the show, could be cast. In ‘Folies Bergère,’ her big number, she reveled in the joys of the good old days of show business, stopped to chat flirtatiously with audience members and ended up gloriously wrapped in a 30-foot-long black feather boa.”