Estevez was born in Dayton, Ohio to a Catholic, Galician (Spanish) father, Francisco Estévez Martínez (1898–1974), and an Irish mother, Mary Anne (née Phelan; 1903–1951).
[2] Estevez stood in for his brother in a number of long shots and in some of the voice-overs for Apocalypse Now (1979), as Martin Sheen was recovering from his heart attack.
[4][5] He plays a villain, Cyrus, in the film Doonby (2012), which features former The Dukes of Hazzard star John Schneider as a mysterious stranger who comes into a small town and falls in love with the spoiled daughter of Estevez's character, the local doctor.
[6] Estevez is the youngest sibling of Martin Sheen and sounds very similar to him, a fact he took advantage of when he performed a voice-over for a National Shooting Sports Foundation pro-gunmaker commercial in 2000; at the time, his brother was famous for playing a President of the United States on the television series The West Wing.
[7] Estevez also recorded the voiceover for his brother's role as Captain Willard in Apocalypse Now after Sheen's health issues on set prevented him from doing so.