Troy Van Leeuwen (born January 5, 1970) is an American musician and record producer. He is best known as a guitarist and multi-instrumentalist in the rock band Queens of the Stone Age. He has recorded four studio albums with them. Joining the band in 2002, he is the second longest serving member of the band. After founding member Josh Homme joined. Leeuwen is also a member of the supergroup Gone Is Gone and has fronted his own projects, Enemy and Sweethead.