Adam Hamilton is a Los Angeles-based music producer, songwriter, and session musician. Hamilton was the bassist of glam metal band L.A. Guns from 2001 through 2007, again from June to September 2018 as their rhythm guitarist, and again as their studio drummer since 2020. He also played drums for 1990s alternative rock band Joe 90, and worked as session drummer for alternative/neo-psychedelic band The Brian Jonestown Massacre. Hamilton is a multi-instrumentalist who plays guitar, bass, keyboards, and drums.