In a major move in the music agency world, Don Muller has moved to William Morris Agency from Creative Artists Agency, taking with him such acts as Pearl Jam, Foo Fighters, Beastie Boys, Weezer, Tenacious D and Mars Volta.

Muller will be reunited with his pal Marc Geiger, who heads up WMA's contemporary music division and with whom Muller co-founded Lollapalooza in 1992 along with Perry Farrell. The two left WMA in 1997 to co-found the musical digital company Artist Direct. Muller had been at CAA since 2002.

Muller, who is bringing Scars on Broadway and Maxwell with him, also worked with the Red Hot Chili Peppers while at CAA. It is unclear at this time if that band will be joining him.

Muller's joining strengthens WMA's already muscular music division. The department is coming off its strongest showing at the Grammys ever, with acts Kanye West, Prince, Amy Winehouse, Alicia Keys, Eagles among the winners.

Muller began his career at the Triad Agency, which was acquired by WMA in 1992.