Josh Adam Klinghoffer (born October 3, 1979) is an American musician best known as the current guitarist for the rock band Red Hot Chili Peppers, with whom he has recorded one studio album, I'm With You (2011), and its subsequent b-sides compilation, I'm Beside You (2013). Klinghoffer replaced his friend and frequent collaborator John Frusciante, in 2009, after a period of being a touring member. A multi-instrumentalist, Klinghoffer also fronts the alternative rock band Dot Hacker, and is a former member of the bands, Ataxia, Warpaint and The Bicycle Thief.
Klinghoffer most commonly plays guitar or drums, and sings backup as well as lead vocals. He has also both recorded and toured as a session musician with Gnarls Barkley, Sparks, PJ Harvey, Beck, The Butthole Surfers, Golden Shoulders and Vincent Gallo amongst others.
Klinghoffer was inducted into the Rock and Roll Hall of Fame with the Red Hot Chili Peppers on April 14, 2012, becoming the Hall of Fame's youngest-ever living inductee.