Worf is a fictional character from the Star Trek franchise, primarily known for his role in the television series Star Trek: The Next Generation and Star Trek: Deep Space Nine. He is a Klingon, a warrior race known for their strong sense of honor and combat skills. Worf serves as the chief of security aboard the starship USS Enterprise and later the USS Defiant, often facing challenges related to his dual heritage as both a Klingon and a human. Worf is portrayed by actor Michael Dorn, who has become synonymous with the character. Throughout the series, Worf grapples with his identity, loyalty, and the complexities of Klingon culture. His character development includes themes of honor, duty, and the struggle between personal beliefs and societal expectations.