Thomas Francis Wilson Jr. (born April 15, 1959) is an American actor and comedian. He is best known for playing Biff Tannen, Griff Tannen, and Buford "Mad Dog" Tannen in the Back to the Future film trilogy (1985–1990). He also played coach Ben Fredricks in the comedy series Freaks and Geeks (1999–2000) and voices various characters, mainly villains, on the Nickelodeon animated series SpongeBob SquarePants (2001–present).
Thomas Francis Wilson Jr. was born in Philadelphia on April 15, 1959, and grew up in nearby Wayne. While attending Radnor High School, he was involved in dramatic arts, served as president of the debate team (where his partner was future New York Times columnist David Brooks), played the tuba in the high school band, and was the drum major of the school marching band. He studied international politics at Arizona State University and attended the American Academy of Dramatic Arts in New York City. In 1979, he got his first significant stage experience as a comedian.
In 1981, Wilson moved to Los Angeles to pursue his acting career. He shared an apartment with fellow aspiring comedians Andrew Dice Clay and Yakov Smirnoff, and later joked that he "taught them both about America". He had a small role in the second season of NBC's Knight Rider in an episode titled "A Knight In Shining Armor".

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