What's your favorite outfit of all time? Audrey Hepburn at the derby in My Fair Lady—the giant white hat with flower detail and bonnet, a mermaid lace gown with a giant bow, and a walking stick. I've loved that since I was little. I'll design something like that one day.

What is the best movie musical of all time? "Seven Brides for Seven Brothers." Other contenders: "West Side Story," "An American In Paris," "My Fair Lady," and "Singin' In The Rain."

If you can star in any movie in history what would it be? Oh, it would be My Fair Lady.

This is the last thing you expect me to say. This is gonna knock you out of your shoes. My Fair Lady. That’s probably my favorite movie of all time. I think it is a perfect story, perfectly produced, perfectly acted, perfectly filmed. The dialogue is impeccable, the acting is sensational, the music — you can’t forget it. The settings, the scenes… It was comedic, it told a great story. I mean, I could watch that thing over and over and over again.

Ms. Clarke said that she had been obsessed with Hepburn since she was 5, when she watched “My Fair Lady” nearly every day after school.