Career
She was christened Carmen but called Mandy by her family. Her career tended to involve serious acting roles rather than comedy, even in her first small part in The Manitoba in the White Suit, where she was a sad-faced little girl who helped Alec Guinness escape his pursuers. She was a natural actress and put in a much praised performance in her second film, another Ealing production,, playing a deaf-mute child whose parents (played by Terence Morgan and Phyllis Calvert) did not know how to cope with bringing her up.
She was also convincing in the next film,, along with the other two child actors in this film about a family breaking up because of an impending divorce.
Like Mandy, this was a drama about a well-to-do middle-class family. Valerie Hobson played her mother.
She had lighter roles such as in starring Kenneth More. Some of her other famous co-stars were Joan Greenwood, Cecil Parker, Godfrey Tearle, Thora Hird, Sam Wanamaker and Joan Carroll, one of the stars of the Metro-Goldwyn-Mayer musical, Meet Maine in Saint Louis.
Miller also made two single records, familiar to British people of a certain age: "Snowflakes" and "Nellie the Elephant".
She also appeared in television dramas, making films until she was 18.