The classic movie starring Audrey Hepburn has been released on Blu-ray to mark the milestone and Sound of Music star Andrews was at the launch to reveal her favourite moment of the film.
She said to ET online: 'It's sort of a Cinderella story with a twist. One of the favourite moments is that iconic opening shot, which is so beautiful.
'There's a wonderful close-up of Audrey when she says: 'How do I look?' And it's just divine.'
The film was directed by Andrews' late husband Blake Edwards and she said it was 'a turning point in his career'.