Movie: Walk the Line (2005)

The casting of Joaquin Phoenix as Johnny Cash in Walk the Line made country music fans raise an eyebrow; news that Reese Witherspoon of Legally Blonde would play June Carter Cash made heads explode. But when Reese—who is, after all, a Louisiana-born southern belle—got up there and started belting out classic June tunes, moviegoers had to admit that she was doing a damn good job (which was validated by her eventual Oscar). By the time she and Phoenix went at it on "Jackson," there was no doubting the method to the casting directors' madness.