My Fair Lady provided the singing voice of Audrey Hepburn in the film version. A U.S. tour of Mackintosh's 2001 West End production ran from September 12, 2007, to June 22, 2008. The production starred Christopher Cazenove as Higgins, Lisa O'Hare as Eliza, Walter Charles as Pickering, Tim Jerome as Alfred Doolittle and Nixon as Mrs. Higgins, replacing Sally Ann Howes. An Australian tour produced by Opera Australia commenced in May 2008. The production starred Reg Livermore as Higgins, Taryn Fiebig as Eliza, Robert Grubb as Alfred Doolittle and Judi Connelli as Mrs Pearce. John Wood took the role of Alfred Doolittle in
Marni Nixon Joan Roberts as Heidi Schiller in the Broadway revival of Stephen Sondheim's "Follies". She played Eunice Miller in "70, Girls, 70" in a 2002 production in Los Angeles. In 2003, she was again on Broadway as a replacement in role of Guido's mother in the revival of "Nine". Nixon appeared as Frau Direktor Kirschner in the 2009 Encores! production of the musical "Music in the Air" at New York City Center. Her autobiography, "I Could Have Sung All Night", was published in 2006. She performed in the 2008 North American Tour of Cameron Mackintosh's UK revival of "My Fair Lady"