Born Michael Balzary, he is the bassist of the Red Hot Chili Peppers and widely considered to be one of the greatest rock bassists of all-time.
He met Anthony Kiedis, the future Red Hot Chili Peppers frontman, at Fairfax High School in Los Angeles. He first played jazz trumpet but was taught the bass by Hillel Slovak, who would become the Red Hot Chili Peppers' first guitarist.
He married Loesha Zeviar in June 1988 and then later got remarried to actress Frankie Rayder in 2005. He and Frankie had their first child together, Sunny Bebop Balzary, in 2005.
In 2009, he and Radiohead frontman Thom Yorke formed the supergroup Atoms for Peace. They released their first album, Amok, in 2013.