Toby Jones on playing Alfred Hitchcock
21 December 2012 Last updated at 11:16 GMT
He was the master of suspense, and she was his greatest muse.
Alfred Hitchcock was at the height of his fame when, in 1962, he chose Tippi Hedren to star in his film The Birds and shot her to stardom.
Toby Jones plays the film-maker in new drama The Girl, and told BBC Breakfast about the transformation process.
The Girl, BBC Two, Boxing Day, 9pm