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Believe It Or Not, Jason Alexander Gives Seinfeld Superfan Kat Dennings A One-Of-A-Kind George Costanza Voicemail! Watch HERE!

| Filed under: TV NewsGIFsLate Night TVNostalgiaKat Dennings

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This isn't the first time Kat Dennings has been around a celeb. We mean, come on, she hangs around shirtless Chris Hemsworth on the regular in the Thor movies!

But we've never seen her freak out like she did over Seinfeld star Jason Alexander!

[ Photos: Celebs Fangirling Over Other Celebs! ]

And Jason made the moment all the more special when he recorded a custom George Costanza voicemail message for her!

See the moment that reduces Kat to tears (below)!

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