Biography
Hayley Catherine Rose Vivien Mills (born 18 April 1946) is an English actress. The daughter of Sir John Mills and Mary Hayley Bell, and younger sister of actress Juliet Mills, Mills began her acting career as a child and was hailed as a promising newcomer, winning the BAFTA Award for Most Promising Newcomer for her performance in the British crime drama film Tiger Bay (1959), the Academy Juvenile Award for Disney's Pollyanna (1960) and Golden Globe Award for New Star of the Year – Actress in 1961. During her early career, she appeared in six films for Walt Disney, including her dual role as twins Susan and Sharon in the Disney film The Parent Trap (1961). Her performance in Whistle Down the Wind (a 1961 adaptation of the novel written by her mother) saw Mills nominated for BAFTA Award for Best British Actress.
Known For

Trap
Dr. Josephine Grant

The Parent Trap
Susan Evers / Sharon McKendrick

Arthur's Whisky
Karen

Appointment with Death
Miss Quinton

That Darn Cat!
Patti Randall

Pollyanna
Pollyanna

A Troll in Central Park
Hilary (voice)

The Moon-Spinners
Nikky Ferris

The Parent Trap II
Susan Corey / Sharon Ferris

The Family Way
Jenny Piper