Who Am ?

Smarty-pants challenge! Read the clues, guess the person...
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Who Am I

Clue #1: My big brother and I appeared on our father's TV show when we were kids. 

Clue #2:  I'm an actor and a musician. I even sold a couple of songs to Quincy Jones when I was a teenager.

Clue #3: I was one of the youngest actors to be nominated for an Oscar when I was 22, but it took almost 40 years for me to win.

Clue #4: There’s an annual festival in honor of one of my most famous films. Fans loved it when I showed up to play Bob Dylan’s “The Man in Me.”

Clue #5:  Yeah, well, The Dude abides.

Who Am I?