Conversation so far:
where was Glenda Jackson born?
Jackson was born in Birkenhead on the Wirral, Cheshire
where did Glenda Jackson attend school?
Jackson was educated at the West Kirby County Grammar School for Girls
who were Glenda Jackson's parents?
her father was a builder, and her mother worked in shops and as a cleaner.
when did Glenda Jackson begin her acting career?
Jackson made her professional stage debut in Terence Rattigan's Separate Tables in 1957

Question: what was her first film?
Self-contained rewrite: what was Glenda Jackson's first film?