River Jude Phoenix (né Bottom; August 23, 1970 – October 31, 1993) was an American actor and musician.

Phoenix grew up in an itinerant family, as the older brother of Rain Phoenix, Joaquin Phoenix, Liberty Phoenix, and Summer Phoenix. He had no formal schooling, but showed an instinctive talent for the guitar. He began his acting career at age 10 in television commercials. He starred in the science fiction adventure film Explorers (1985) and had his first notable role in 1986's Stand by Me, a coming-of-age film based on the novella The Body by Stephen King.

Phoenix made a transition into more adult-oriented roles with Running on Empty (1988), playing Danny Pope, the son of fugitive parents in a well-received performance that earned him a nomination for an Academy Award for Best Supporting Actor (at age 18, he became the sixth-youngest nominee in the category), and My Own Private Idaho (1991), playing Michael Waters, a gay hustler in search of his estranged mother. For his performance in the latter, Phoenix garnered enormous praise and won a Volpi Cup for Best Actor at the 1991 Venice Film Festival as well as Independent Spirit Award for Best Male Lead and National Society of Film Critics Award for Best Actor, becoming the second-youngest winner of the former.

Phoenix died at age 23 from combined drug intoxication in West Hollywood in the early hours of Halloween, 1993, having overdosed on cocaine and heroin (a mixture commonly known as speedball) at The Viper Room.

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