I went away when I was 9 to a ballet school. I thought I wanted to be a dancer, but eight years of ballet cured me of that.

She won an Emmy Award for her performance in the television miniseries QB VII (1974). Because of her parents' fame Mills grew up surrounded by famous actors such as Rex Harrison David Niven and Marlon Brando and Juliet Mills recalled her childhood in the 2000 documentary film Sir John Mills' Moving Memories which was written by her brother Jonathan. She also guest-starred in two episodes of Hot in Cleveland as Philipa Scroggs Joy's mother.

The daughter of Sir John Mills and Mary Hayley Bell and the sister of actress Hayley Mills Juliet Mills began her career as a child actress. Juliet Maryon Mills (born 21 November 1941 London) is an English actress.