Olivia Wilde hit the red carpet today for another "Cowboys & Aliens" premiere in London -- where she was showing some serious skin!

While her Gucci polka-dot dress and bow looked all business from the front, it was a totally different story for the sheer side-view.

While the risque cut is new, Wilde has been rocking what we're calling the "Gothic-cowgirl" look at every stop of the "Cowboys & Aliens" tour.

Check out more shots of this gown -- plus her other lacy, black numbers above!

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