Jerome Allen "Jerry" Seinfeld is an American comedian, actor and writer, whose style is often described as observational comedy. He is best known for playing a semi-fictional version of himself in the situation comedy, Seinfeld, (1989-1998), which he co-created, helped write and, in the show's final two seasons, executive produced. In March 2009, it was announced that Jerry and the entire cast of Seinfeld will be appearing on Larry David's HBO original series Curb Your Enthusiasm. Seinfeld is known for his incredibly dedicated and devoted work ethic. He was ranked #12 in Comedy Central's list of the 100 Greatest Stand-ups of All Time.