Joaquin Phoenix earned a Best Actor nomination for playing musician Johnny Cash in the biopic Walk the Line.
Joaquin Phoenix . He has subsequently earned Best Actor nominations for portraying musician Johnny Cash in the biopic Walk the Line ( 2005 ) and for his role as Freddie Quell , a sex-obsessed alcoholic World War II veteran in the drama film The Master ( 2012 ) , the latter winning him the Volpi Cup for Best Actor .