The 72-year-old is still finding time to serve as an ambassador for a cause close to his heart, Helping a Hero.
JOAQUIN PLAYS FOLSOM PRISON
Actor Joaquin Phoenix, who's drawing raves for his portrayal of Johnny Cash in the movie Walk the Line, retraced Johnny's steps as he played a concert at California's Folsom Prison.
Shooter Jennings and Joaquin Phoenix
by Eric Charbonneau/WireImage.com