RBMaraman said:Reese Witherspoon not only spent time with June Carter Cash studying and learning how she acts, she also learned how she sings. Then, she took voice lessons to learn to sing. On top of that she learned to play the guitar, banjo, and piano. Then she had the guts to sing for the film and soundtrack. That's a lot of work to prepare for a single role.
From IMDB:
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June Carter Cash died before production began on the film, so Reese Witherspoon's research included looking through Carter's closet for inspiration.
Reese Witherspoon did her own singing. She also had to learn to play the auto-harp.
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Not saying she didn't meet with Mrs. Cash or learn how to play the guitar, banjo, and piano but just wondering where you got your info from. I think her performance was pretty good in Walk the Line however. In an age where musicals rarely exist in the mainstream it takes a lot of work to get an actor/actress to get up and sing on the big screen I think.