John Rhys-Davies. He also crossed over to a successful music career, primarily in Germany, Austria and Switzerland. He plays as himself in The SpongeBob SquarePants Movie as said in the credits. He also appears as a minor character in SpongeBob's Big Birthday Blowout.
 The SpongeBob SquarePants Movie
David Hasselhoff appears at the climax of the movie in order to get SpongeBob and Patrick back to Bikini Bottom. He seemed to not be human in the movie, but was very friendly. SpongeBob and Patrick fought Dennis on David Hasselhoff's body, and then David used his rocket launching pecs to launch SpongeBob and Patrick back to the Krusty Krab II. However, he was burnt by King Neptune's giant ray. Somehow revealed to be alive, he most likely swims to shore. Although, David Hasselhoff only made an appearance in The SpongeBob SquarePants Movie. He wasn't seen in later episodes,and so far that's his only appearance. He made an episode in the movie game.