Troy Van Leeuwen (Dutch pronunciation: [vɑn ˈleːu̯ə(n)]; 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, with whom he has recorded five studio albums. Joining the band in 2002, he is the second-longest-serving member of the band, after founding member Josh Homme.