Happy birthday! Katherine Moennig turns 48 today

The iconic and legendary actress turns 48 on Monday, Dec. 29, 2025.

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Katherine Moennig is celebrating her 48th birthday today. As a number of online tributes attest, she is one of the most acclaimed actresses of her generation.

Popular actress Katherine Moennig (The L Word, Young Americans, Ray Donovan, ...) has always liked to keep a bit of herself hidden from view. At 48th birthday, she remains a woman of many facets.

Moennig, a cultural icon

Born in Philadelphia on December 29, 1977, Katherine Moennig's career spans an arc over many different eras and tastes in American history. Moennig's not just a great actress, she's an inspiration, an icon and a successful business woman. At this point in her career, there seems to be little Katherine hasn't done.

And we've got a feeling the next 12 months are going to be even bigger and better for Katherine Moennig as she promises more to come. After all, she's only 48.

Happy Birthday, Katherine, you're the best!

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