Liev Schreiber (born October 4, 1967) is an American actor, director (film director), and screenwriter. He became known during the late 1990s and early 2000s, having initially appeared in several independent films, and later mainstream Hollywood films, including the Scream (Scream (film series)) trilogy of horror films, X-Men Origins: Wolverine, and Defiance (Defiance (2008 film)). Schreiber is also a respected stage actor, performing in several Broadway (Broadway theatre) productions. In 2005, Schreiber won a Tony Award for his performance in the play Glengarry Glen Ross. That year, Schreiber also made his debut as a film director and writer with Everything Is Illuminated (Everything Is Illuminated (film)), based on the novel (Everything Is Illuminated) of the same name.

Schreiber is in a relationship with Naomi Watts, with whom he has two children.