Happy birthday! Jason Alexander turns 66 today

The iconic and legendary actor turns 66 on Tuesday, Sep. 23, 2025.

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Jason Alexander is celebrating his 66th birthday today. As a number of online tributes attest, he is one of the most acclaimed actors of his generation.

Popular actor-director-producer Jason Alexander (Seinfeld, ...) has always liked to keep a bit of himself hidden from view. At 66th birthday, he remains a man of many facets.

Alexander, a cultural icon

Born Jason Scott Greenspan in Newark on September 23, 1959, his career spans an arc over many different eras and tastes in American history. Alexander's not just a great actor, he's an inspiration, an icon and a successful business man. At this point in his career, there seems to be little Jason hasn't done.

And we've got a feeling the next 12 months are going to be even bigger and better for Jason Alexander as he promises more to come. After all, he's only 66.

Happy Birthday, Jason, you're the best!

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