Born Jay Greenspan, Alexander is an accomplished actor who played a key role in the award-winning TV sitcom "Seinfeld", arguably the most successful TV series ever made. His character, the neurotic ne'er-do-well George Costanza, Jerry Seinfeld's best friend, was based in part on the show's creator, Larry David. Long live Seinfeld
More details are available here: http://uk.imdb.com/Name?Alexander,+Jason
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