"I was determined not to suck in this movie..."

Congratulations on your Oscar nomination. Did you celebrate?
Thank you. No, I was asleep! I was in Berlin and I was jetlagged. My publicist came in screaming. I thought it was my daughter at first and I thought, “Why is she screaming?” They woke me up and told me and I was very excited. I called my mother and my husband [Ryan Phillipe]. It’s exciting because the film he was in, Crash, is nominated as well for Best Picture.

How did you get involved with Walk The Line?
James Mangold, the writer and director, approached me two years before he even had a script. He said, “I’m going to make a film about Johnny Cash” and I think my eyes came out of my skull. I’m from Nashville, Tennessee, which is like the centre of country music in America, so not only did I know everything about Mr Cash but I knew about June Carter Cash. The Carter family are the foremost country music family of our time. I even played Mama Maybelle Carter in my fourth grade play so I was so excited when he said he was making the film.

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