Joaquin Phoenix Photos: A Retrospective (SLIDESHOW)

Joaquin Phoenix first gained fame in the 1980s as Leaf Phoenix, younger brother to the more famous River Phoenix.

He later changed his name to Joaquin and is currently famous for his bizarre appearance on David Letterman.

After 20 years and two Oscar nominations and a Golden Globe win for his portrayal of Johnny Cash, Phoenix announced last year that he's done with acting and instead plans a career in hip-hop music.

Below, in chronological order, is a look at Phoenix over the past 23 years during his life as an actor.