Sienna Miller Turns 33—See Her Best Looks Yet!

Sienna Miller
Photo: Chance Yeh/FilmMagic

Happy birthday to the fabulous Sienna Miller! The British-American actress and model turns 33 today. Best known for her roles in Layer Cake, Factory Girl, and The Edge of Love, Sienna was nominated for Best Actress at the BAFTAs and Golden Globes for her role in the 2012 TV film The Girl. This month, you catch her in the biographical action-drama American Sniper, opposite Bradley Cooper.

Aside from her successes in acting and modeling, Sienna is quite a trendsetter, known for her swank street-style and ravishing red carpet looks. In honor of the star's birthday, take a look back at some of her most fashion-forward ensembles.

PHOTOS: Sienna Miller's Best Looks Ever

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