The 58-year-old comedian played one of the biggest shows of his career at London's 20,000-capacity O2 Arena last year (11), and this month (May12) he's due to entertain 16,000 fans over two gigs in England.
But he's now revealed the shows are likely to be among his last ever arena concerts as he's planning to walk away from high-profile stand-up comedy before he's too old to get the laughs.
Seinfeld tells Live magazine, "I won't perform this size of show again. These things have their critical mass, which does not sustain indefinitely. I'm 57 now (sic). Do you really want to see a 67-year-old guy in front of 10,000 people? I don't want to. I'm going to let it wither and die."