Stephen Lang is an American actor and playwright, best known for his roles in film, television, and theater. He gained widespread recognition for his portrayal of Colonel Miles Quaritch in the blockbuster film series, Avatar. Lang has also appeared in various other films, including Gettysburg and Tombstone, showcasing his versatility as an actor. In addition to his film work, Lang has a strong background in theater, having performed in numerous stage productions. He has received critical acclaim for his performances in plays such as The Speed of Darkness and The Glass Menagerie. Lang's talent and dedication to his craft have made him a respected figure in the entertainment industry.