Unknown (2011 film)

Unknown
Unknown
	Theatrical release poster
Directed by	Jaume Collet-Serra
Written by	Oliver Butcher; Stephen Cornwell;
Based on	Out of My Head; by Didier Van Cauwelaert
Produced by	Joel Silver; Leonard Goldberg; Andrew Rona;
Starring	Liam Neeson; Diane Kruger; January Jones; Aidan Quinn; Frank Langella;
Cinematography	Flavio Labiano
Edited by	Tim Alverson
Music by	John Ottman; Alexander Rudd;
Production; companies	Dark Castle Entertainment; Studio Babelsberg Motion Pictures GmbH; Panda;
Distributed by	Warner Bros. Pictures (International); Kinowelt Filmverleih (Germany); Optimum Releasing (United Kingdom); StudioCanal (France);
Release dates	16 February 2011 (Westwood); 18 February 2011 (United States); 2 March 2011 (France); 3 March 2011 (Germany); 4 March 2011 (United Kingdom);
Running time	113 minutes
Countries	United States; Germany; United Kingdom; France;
Language	English
Budget	$30–40 million
Box office	$136.1 million

Unknown is a 2011 action thriller film directed by Jaume Collet-Serra and starring Liam Neeson, Diane Kruger, January Jones, Aidan Quinn, Bruno Ganz, and Frank Langella. The film, produced by Joel Silver, Leonard Goldberg and Andrew Rona, is based on the 2003 French novel by Didier Van Cauwelaert published in English as Out of My Head which was adapted as the film's screenplay by Oliver Butcher and Stephen Cornwell. The narrative centers around a professor who wakes up from a four-day long coma and sets out to prove his identity after no one recognizes him, including his own wife, and another man claims to be him.

Released on 18 February 2011, the film received mixed reviews from critics and grossed $136 million against its $30 million budget.