Eric Christian Olsen, born on May 31, 1977, in Eugene, Oregon, is an American actor best known for his role as Detective Marty Deeks on the CBS television series 'NCIS: Los Angeles.' He began his career in the late 1990s with guest roles in series like 'ER' and 'Community.' Olsen gained wider recognition with films such as 'Not Another Teen Movie' (2001) and 'The Thing' (2011). He is also noted for his work in comedy and action genres, establishing a diverse acting portfolio.