Michael Biehn got his start in movies with a bit part in the film version of Grease in 1978. He appears in two scenes, one in which John Travolta’s character, Danny, hits Biehn’s uncredited character in the stomach while playing basketball. In 1981, he appeared in the role of Douglas Breen, a stalker, in the 1981 film version of Bob Randall’s novel The Fan, starring Lauren Bacall. In 1984, Biehn played Sgt. Kyle Reese, a soldier sent back in time by John Connor to save his mother, Sarah Connor, in the film The Terminator opposite Arnold Schwarzenegger and Linda Hamilton.
He starred in two other films directed by James Cameron: Aliens (as Corporal Hicks) and The Abyss (as Lieutenant Hiram Coffey), and had a small role in Terminator 2: Judgment Day, briefly reprising his role as Reese in a scene cut from the final film but restored for the Director’s Cut version. He was considered to portray the film’s antagonist, the T-1000, but the role went to Robert Patrick.
Biehn reprised the role of Hicks by voicing the character in the video game Aliens: Colonial Marines and again in 2019 for an audio drama adaptation of Gibson’s un-filmed script for Alien 3 released by Audible. Biehn played the role of Johnny Ringo in Tombstone with the showdown scene with Val Kilmer as Doc Holiday.
In the 2000s, Biehn took acting roles ranging from big budget films such as The Art of War and Clockstoppers, to video games like Command & Conquer: Tiberian Sun and independent movies, such as Havoc. He also starred in three TV series including the CBS drama The Magnificent Seven (1998–2000), the Tribune Entertainment syndicated TV series Adventure Inc. (2002–2003), and the NBC TV series Hawaii (2004).
Biehn directed the 2010 film The Blood Bond. In 2011 he wrote, directed and starred in The Victim.
In 2020, Biehn was cast by Jon Favreau in the second season of the Star Wars television series The Mandalorian.