Jerry Seinfeld refused to ever work with Larry David.
 In May 1981, Seinfeld made an appearance on The Tonight Show Starring Johnny Carson, impressing Carson and the audience, leading to frequent appearances on that show and others, including Late Night with David Letterman
 In 2008, David was reported to gross $55 million in total compensation, mostly from Seinfeld syndication and work on Curb Your Enthusiasm

