British actress, famous for her role in The Parent Trap (1961), in which she played twins.
Mills made her debut performance in the thriller Tiger Bay (1959) when she was a child. She turned heads around the world, from Germany, where she won an award at the Berlin Film Festival, to Hollywood, when Walt Disney came knocking at her door. He signed her to a five-year contract. For her first film for the studio, Pollyanna (1960), she won critical raves, box-office success, and a special Juvenile Academy Award. After her performance in The Parent Trap, she continued to appear in routine Disney films, including In Search of the Castaways (1962) and Summer Magic (1963), as well as films outside the studio, such as Whistle Down the Wind (1961), and The Chalk Garden (1964).
She appeared in three TV-movie sequels to The Parent Trap (1961) in the late 1980's, and also appeared in the BBC miniseries The Flame Trees of Thika (1981) and the TV series Good Morning, Miss Bliss (1987), later re-titled Saved by the Bell (1989).