Happy birthday! Sienna Miller turns 44 today

The iconic and legendary actress turns 44 on Sunday, Dec. 28, 2025.

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Sienna Miller is celebrating her 44th birthday today. As a number of online tributes attest, she is one of the most acclaimed actresses of her generation.

Popular actress Sienna Miller (G.I. Joe: The Rise of Cobra, Factory Girl, Layer Cake, ...) has always liked to keep a bit of herself hidden from view. At 44th birthday, she remains a woman of many facets.

Miller, a cultural icon

Born Sienna Rose Miller in New York on December 28, 1981, her career spans an arc over many different eras and tastes in British history. Miller'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 Sienna hasn't done.

And we've got a feeling the next 12 months are going to be even bigger and better for Sienna Miller as she promises more to come. After all, she's only 44.

Happy Birthday, Sienna, you're the best!

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