Joaquin Rafael Phoenix, pronounced /hwɑːˈkiːn ˈfiːnɪks/, (born October 28, 1974), formerly credited as "Leaf Phoenix," is a film actor, musician, and occasional rapper. He was born in San Juan, Puerto Rico, where he lived for the first 4 years of his childhood. His family then moved to the continental United States, where he was raised. Among the many places in which he lived, because of his family's frequent moving, were Mexico and various countries in South America. Phoenix is from a family of performers which includes his older brother, the late River Phoenix.

Phoenix has ventured behind the camera, directing music videos as well as producing movies and television shows, and has recorded an album, the soundtrack to Walk the Line. He is also known for his work as a social activist, particularly as an advocate for animal rights. On October 27, 2008, he announced his retirement from film in order to focus on his rapping career.

Phoenix was born Joaquin Rafael Bottom in Río Piedras, located in the city of San Juan, Puerto Rico. He is the third of five children, including River (1970-1993), Rain (1972), Liberty (1976), and Summer (1978). He also has a half-sister named Jodean (1964), from his father's first marriage.