Troy Van Leeuwen (born January 5, 1970) is an American rock musician and producer. He is best known as the guitarist for the rock band Queens of the Stone Age (QOTSA), for which he has served since 2002. He is also known for his work with the rock band Failure, and with alternative rock supergroup A Perfect Circle, as well as recordings with QOTSA members' side projects such as the Desert Sessions, Mondo Generator, Eagles of Death Metal and the Gutter Twins. Van Leeuwen created his first side-project, Enemy, in 2005, Sweethead, in 2008, Gone Is Gone, in 2016, and toured with Iggy Pop supporting his album Post Pop Depression made with QOTSA bandmates Josh Homme and Dean Fertita.