9 Celebrities You Didn't Know Guest Starred On 'Seinfeld'

It's no secret—Seinfeld is one of the most popular television series ever. For the better part of the ‘90s, millions of people tuned in each week to get a glimpse into the life of four zany friends living in New York City. Perhaps just as beloved as Jerry, George, Elaine, and Kramer, though, was the rotating door of guest stars, which spanned already-famous performers to ones who were at the very beginning of their careers.

From a modern-day superstar who got their start on the buzzy show to a huge ‘90s actress who played one of Jerry’s love interests, here are 9 celebrities you didn’t know guest starred on Seinfeld. A few may surprise you.