John Anthony Frusciante ⁱ/fruːˈʃɑːnteɪ/; born March 5, 1970) is an American guitarist, singer, songwriter, record and film producer. He is best known as the former guitarist of the rock band Red Hot Chili Peppers, with whom he had been for a number of years and recorded five studio albums. Frusciante has an active solo career, having released ten albums under his own name, as well as two with Josh Klinghoffer and Joe Lally as Ataxia. His solo recordings include elements ranging from experimental rock and ambient music to New Wave and electronica. Influenced by guitarists of various genres, Frusciante emphasizes melody and emotion in his guitar playing, and favors vintage guitars and analog recording techniques.

Frusciante joined the Red Hot Chili Peppers at eighteen years old, first appearing on the band's 1989 album, Mother's Milk. The group's follow-up album, Blood Sugar Sex Magik (1991), was a breakthrough success. However, he was overwhelmed by the band's new popularity and quit in 1992. He became a recluse and entered a long period of drug addiction, during which he released his first solo recordings: Niandra Lades and Usually Just a T-Shirt (1994) and then Smile from the Streets You Hold (1997). In 1998, he successfully completed drug rehabilitation and rejoined the Red Hot Chili Peppers with the album Californication (1999). His album To Record Only Water for Ten Days was made in 2001. On a creative spree, Frusciante released six solo albums in 2004; each album explored different recording techniques and genres. In 2009, Frusciante released The Empyrean and again parted ways with the Red Hot Chili Peppers. As of 2011, Frusciante is currently working on his eleventh solo album. Frusciante has produced and/or recorded with the Wu-Tang Clan, The Mars Volta, George Clinton and others. His most recent solo releases will be a 5 song EP entitled Letur-Lefr, due out in July 2012, and a full length album entitled PBX Funicular Intaglio Zone, due out in late 2012.