See the Birthday Babe's Best Looks!

Happy Birthday, Jaimie Alexander!

The Agents of S.H.I.E.L.D. star turns 30 on Wednesday, and in honor of her special day, we thought we'd take a look back at some of her best looks.

Obviously, we have to start off with the infamous, very sheer gown she wore to the Thor: The Dark World premiere in November. She claimed she had "something" on under the ultra-revealing black Azzaro Couture dress, but wouldn't go any further on that.

She joked with Jay Leno on the Tonight Show that moving around in the sexy frock required "flexing every muscle that I don't have." A rep for Jaimie told E! News the actress and her stylist Emilie Pereira knew the dress was daring, "but this one was a fashion risk she felt worth taking."

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