Louis Jude "Lou" Ferrigno (born November 9, 1951) is an American actor, fitness trainer/consultant, 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 bodybuilding documentary Pumping Iron.

After graduating from high school in 1969, Ferrigno won his first major titles, IFBB Mr. America and IFBB Mr. Universe, four years later. Early in his career he lived in Columbus and trained with Arnold Schwarzenegger.

In 1974, he came in second on his first attempt at the Mr. Olympia competition. He then came third the following year, and his attempt to beat Arnold Schwarzenegger was the subject of the 1975 documentary Pumping Iron. The documentary made Ferrigno famous.