Louis Jude Ferrigno Sr. is an American actor and retired professional bodybuilder. As a bodybuilder, Ferrigno won an IFBB Mr. America title and two consecutive IFBB Mr. Universe titles; and appeared in the documentary film Pumping Iron (1977). As an actor, he is best known for his title role in the CBS television series The Incredible Hulk (1978–1982) and vocally reprising the role in subsequent animated and computer-generated incarnations. He has also appeared in European-produced fantasy-adventures such as Hercules (1983) and Sinbad of the Seven Seas (1989), and as himself in the sitcom The King of Queens and the 2009 comedy I Love You, Man.

Bodybuilding is the practice of progressive resistance exercise to build, control, and develop one's muscles via hypertrophy. An individual who engages in this activity is referred to as a bodybuilder. It is primarily undertaken for aesthetic purposes over functional ones, distinguishing it from similar activities such as powerlifting, which focuses solely on increasing the physical load one can exert.