It's Julia Louis-Dreyfus' 55th Birthday — See the Cast of 'Seinfeld' Then and Now!

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Happy 55th Birthday, Julia Louis-Dreyfus!

To celebrate the actress' special day, click through our gallery above to see the cast of Seinfeld then and now!

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Jerry Seinfeld

Not that there's anything wrong with it, but after the success of Seinfeld, Jerry, 63, hasn't had to settle on any one thing — stand-up, Amex ads, the film Bee Movie and the web series Comedians in Cars Getting Coffee are just a few of many projects on the star's plate!

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Julia Louis-Dreyfus

It's enough to make even picky Elaine Benes proud, as Julia, 57, went on to become master of her TV domain, with big roles on The New Adventures of Old Christine and Veep.

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Jason Alexander

George Costanza was a hard act to follow, so yada, yada, yada, Jason, 58, has done flicks including Shallow Hal, stints onstage a la The Producers and guest spots such as the Seinfeld reunion on Curb Your Enthusiasm.

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Michael Richards

As Cosmo Kramer would say, "Hoochie mama!" After playing TV's most famous hipster doofus, Michael, 68, got in hot water over his stand-up routine before resuscitating his career on TV Land's Kirstie.

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