♪ Will you still love me ♪ that beautiful car. Celebrating "the great gatsby" all week long here at "gma" and today it is all about daisy buchanan played by one of hollywood's most... See More
♪ Will you still love me ♪ that beautiful car. Celebrating "the great gatsby" all week long here at "gma" and today it is all about daisy buchanan played by one of hollywood's most stylish young stars, carey mulligan. Take a look. My shack is it just a cardboard box. Your life is adorable. I know somebody in west -- I don't know a single person that side of the bay. Oh, you must know gatsby. Gatsby? What gatsby? Madame, the dinner is served. And carey mulligan joins us. Great to have you here. Great to be here. You like that car. I love that car. I haven't seen that car. It looks great. I love the story of your audition for this. You're up against just about every great young actress in hollywood and you come up with the craziest audition you've ever been through it. Yeah, it was crazy. An audition with baz luhrmann is an experience and I walked into the room and there was three different -- it was kind of like being in here. That was the level of intensity. Real intimate. Yeah, really intimate. Three cameras, two roaming photographers and leonardo reading all the lines of every part. Yes. But you took control and did a little bit of improv at the end of the audition that might have gotten you the part. I think that's the story that was elaborated by baz but said in the script that daisy kisses gatsby and in auditions you never -- you don't know if it's inappropriate so I asked baz should I kiss him and baz said yes so I did and now baz tells others the story that -- he said that's daisy buchanan. That's what it is. You like tobey maguire had not read "the great gatsby" before this began. You did not read it until you learned about the audition but right after that you really crammed. Yeah, well, I had -- I got a call asking if I ever read it and I hadn't so I read it right two days before the audition. Very easy read. And so I read it and I did the audition then we had about a year before we started choosing so I had so much time and went to princeton and got into the archives and got to see the original manuscript and a lot of zelda fitzgerald's letters and scott enso we had so much time to prepare. And created a daisy cocktail. What is it? A daisy -- well, sort of the simple plot in daisy's store and her character, so baz really wanted moo he to look at zelda fitzgerald and was one -- lo looking at her life and genova's family and putting those three together. She put the kardashians in mind? The kardashians are sort of a reference in that daisy's purpose in life is she feels her purpose is to look very beautiful all the time and to constantly be on show so what i was trying to imply was that there's an enessence of part of the amazing business they run as the kardashians is looking beautiful a lot and looking very present presentational and perfect. First time working with leonardo. He was so incredibly generous and sweet and was helping me the wohl way through improvising in character to help me and the whole way through he was so supportive and sweet. And it shows on screening. Carey mulligan, thanks very much. "The great gatsby" opens in THEATERS NATIONWIDE ON MAY 10th.
This transcript has been automatically generated and may not be 100% accurate.