You Know Him As… Samuel "Screech" Powers, the hopelessly dorky sidekick from Saved By the Bell (1989-1993) -- not to mention Saved By the Bell: The College Years (1993-1994) and Saved by the Bell: The New Class (1993-2000).
Where Is He Now? In an effort to be remembered as something other than Screech, Dustin Diamond, now 34, attempted a new career as an obnoxious reality star. He appeared on VH1's Celebrity Fit Club, Hulk Hogan's Celebrity Championship Wrestling, Celebrity Big Brother -- and, most notoriously, in an icky-sounding sex tape. In 2009, Diamond (pictured in 2010) published a tell-all book about his teenage career called Behind the Bell.