Saint was desperate to land the lead in the now classic suspense movie, and reveals her mum knew just what it would take to win over the filmmaker.
She tells Vanity Fair magazine, "I adored him! Before he cast me in North by Northwest, I met him with his wife, Alma, at his house in Bel Air. My agent set it up so we could have lunch together, and I was a little nervous.
"I called my mom, who was a schoolteacher, and she somehow knew that he liked beige. So I wore a beige dress. And Mom says, 'And he likes ladies with white gloves.' So I wore white gloves. He did (like blondes too). But Mom didn't know that."