In 1989, Larry David teamed up with comedian Jerry Seinfeld to create NBC's The Seinfeld Chronicles (later retitled Seinfeld), which was to become one of the most successful shows in television history. David occasionally appeared (uncredited) on the show, and was the primary inspiration for the show's George Costanza character. Larry David left Seinfeld on amicable terms after the seventh season and returned to write the series finale in 1998 two years later. He also continually provided the voice for the character of George Steinbrenner. Although he subsequently stopped writing, his function as executive producer is considered to have defined Seinfeld. Larry's favorite episode is a two-parter called "The Boyfriend" featuring retired major leaguer Keith Hernandez.

The commercial success of Seinfeld has made creators Larry David and Jerry Seinfeld multimillionaires, with syndication and DVD releases earning them hundreds of millions of dollars. Larry David is estimated to have netted over $500 million from Seinfeld alone.

The HBO cable television channel aired David's special, Larry David: Curb Your Enthusiasm, a hybrid work using story outlines and dialogue. Before it aired, HBO had suggested that David commit to a series using the same method. The result, Curb Your Enthusiasm, first aired in 2000. It revisits many of the themes first brought up in Seinfeld, albeit in a markedly different style.

(wikipedia.org)