Troy Dean Van Leeuwen (born January 5, 1970) is an American 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 seminal 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, and a new side-project,
Sweethead, in 2008.