David Michael Hasselhoff (born July 17, 1952) is an American actor, singer, producer and businessman. He is best known for his lead roles as Michael Knight in the popular 1980s US series Knight Rider and as L.A. County Lifeguard Mitch Buchannon in the series Baywatch. Hasselhoff also produced Baywatch for a number of seasons in the 1990s up until 2001, when the series ended with Baywatch Hawaii. Hasselhoff also crossed over to a music career during the end of the 1980s and the early 1990s. He was noted for his performance at the Berlin Wall at New Year's Eve 1989; he enjoyed a short-lived success as a singer primarily in German-speaking Europe.
He appeared as himself in the Nickelodeon Movie The SpongeBob SquarePants Movie. He helped SpongeBob and Patrick Star return to the Krusty Krab in time to prevent the execution of Mr. Krabs by turning into a human launch cannon.