Lost star Matthew Fox will quit the small screen when his run in the hit TV show comes to an end next year.

Fox, who has played the role of troubled surgeon Jack Shepherd in the series since May 2007, landed his first major role in 1990s family TV drama Party of Five.

And after 18 years of small screen parts, he's determined to focus on building up his film credits - starting with a biopic about late American film actor Steve McQueen.

He says, "I'm pretty sure that (Lost) will be the last television thing that I will do... Steve McQueen was pretty f**king cool. He was an action guy and a man of few words and he liked his roles like that."

Lost producers plan to wrap up the storyline with the sixth and final series in 2010.