Actor, comedian, voice artist, producer and musician who was nominated for a Golden Globe Award for Best Actor for his role in School of Rock. His other film credits include High Fidelity, King Kong, Saving Silverman, Goosebumps and Tropic Thunder.
He co-founded the band Tenacious D with Kyle Glass.
His parents worked as engineers on the Hubble Space Telescope. He dated comedian Kathy Griffin in 1992. He married Tanya Haden in 2006 and he has two sons named Thomas and Samuel.
He starred alongside Ben Stiller in the hit comedy Tropic Thunder.