Cindy O'Callaghan played Carrie Rawlins in a 1971 British-American musical fantasy film that was based upon books by who?
Cindy O'Callaghan:  Her acting career began in her adolescence, when she was chosen to play the part of Carrie Rawlins in the Disney feature film "Bedknobs and Broomsticks" in 1971. Bedknobs and Broomsticks:  It is based upon the books "The Magic Bedknob; or, How to Become a Witch in Ten Easy Lessons" (1943) and "Bonfires and Broomsticks" (1945) by English children's author Mary Norton.
i don't know