Patrick Warren (born March 26, 1957) is an American musician, composer, and record producer. He is known for his work on the films Magnolia, Fifty Shades of Grey, Boogie Nights and Red State, as well as the television series True Detective for which he composed and performed his original music and was awarded an Emmy. He composed the theme song and the original score to the Showtime original series The Chi. As a recording artist, he has worked with Michael Penn, Fiona Apple, the Wallflowers, Eagle-Eye Cherry, Stevie Nicks, and Liz Phair. As a touring musician, he has toured with Bob Dylan, Bruce Springsteen, and Lana Del Rey. He is globally known as an expert Chamberlin artist.

Warren is an accomplished pianist and keyboardist, who has performed on Grammy Award-winning records and Emmy Award-winning television series, as well as dozens of feature films including Pleasantville and Across the Universe. Warren is also among the top Chamberlin artists in the world. The Chamberlin is an electro-mechanical keyboard that was first introduced in 1948. Warren has played Chamberlin on many records including Michael Penn's hit single "No Myth," Fiona Apple's 1996 debut Tidal, the song "Road Trippin'" by the Red Hot Chili Peppers from their 1999 album Californication, and Lucinda Williams' Down Where the Spirit Meets the Bone from 2014.

With Michael Penn

With Nerina Pallot

With Michelle Branch

With Taylor Hicks

With Rod Stewart

With Rosanne Cash