Eric Christian Olsen is an American actor and producer, best known for his role as Detective Marty Deeks on the television series NCIS: Los Angeles. Born on May 31, 1977, in Eugene, Oregon, he began his career in the late 1990s, appearing in various television shows and films. In addition to his work on NCIS: Los Angeles, Olsen has appeared in movies such as Not Another Teen Movie and The Last House on the Left. He is also known for his voice work in animated series and has made guest appearances on several popular TV shows throughout his career.