June Carter Cash
In 2005, Mangold co-wrote (with Gill Dennis) and directed "Walk the Line", a film about the young life of singer-songwriter Johnny Cash and his relationship with June Carter Cash. It stars Joaquin Phoenix and Reese Witherspoon and was released on November 18, 2005. He also served as producer under his production banner, Tree Line Film. It was nominated for five Oscars and Witherspoon won Best Actress for her performance as June Carter Cash.