10/29/2008 AT 08:55 AM EDT
Joaquin Phoenix dropped quite a shocker at a benefit for Paul Newman's camps for kids Monday, announcing his plans to quit acting.
"I want to take this opportunity ... to give you the exclusive and just talk a little bit about the fact that this will be my last performance as an actor," the two-time Oscar nominee told Extra
at the San Francisco event. "I'm not doing films anymore."
"Are you serious?" asked the stunned interviewer Jerry Penacoli.
"Yeah. I'm working on my music," Phoenix insisted. "I'm done. I've been through that."
His rep confirmed the retirement to Extra
The 34-year-old performer gave no further details on his career plans – but he has been working on a record
for some time with British band The Charlatans.
Phoenix, who costars in the upcoming romantic drama Two Lovers
with Gwyneth Paltrow
, first learned to play guitar for his Academy-Award-nominated role as Johnny Cash in 2005's Walk The Line
He was also nominated in 2000 for his supporting role in Gladiator
2004: Joaquin learns to sing for Walk the Line
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