Henry Jackson Thomas, Jr. (born September 9, 1971) is an American actor and musician. He has appeared in more than 40 films and is best known for his role as Elliott in the 1982 Steven Spielberg film E.T. the Extra-Terrestrial.

Thomas was born an only child in San Antonio, Texas, the son of Carolyn L. (née Davis), a homemaker, and Henry Jackson Thomas, a hydraulic machinist. In San Antonio he attended East Central High School, in the ECISD district, and Blinn College in College Station, Texas.

Thomas' first marriage to Kelly Hill ended in divorce. He married Marie Zielcke in May 2004. They have a daughter, Hazel. The couple are currently separated.