Eric Christian Olsen, is an American actor. He is known for his portrayals of Investigator Marty Deeks on the CBS television series NCIS: Los Angeles, Austin in the film Not Another Teen Movie, and Lloyd Christmas in Dumb and Dumberer: When Harry Met Lloyd.

NCIS: Los Angeles is an American action crime drama television series combining elements of the military drama and police procedural genres, which premiered on CBS on September 22, 2009. The series follows the exploits of the Los Angeles–based Office of Special Projects (OSP), an elite division of the Naval Criminal Investigative Service that specializes in undercover assignments. NCIS: Los Angeles is the first spin-off of the successful series NCIS and the second series in the NCIS franchise. The series concluded on May 21, 2023, making it the second series in the NCIS franchise to end..