Rosamund Pike - LEAD
Credit: Mike Marsland/WireImage

Rosamund Pike has arrived to prove that pants and a classic gown can make the perfect pairing.

The talented Brit stunned in an ivory floor-length dress from one of her red carpet go-to designers, Givenchy, at the London premiere of A United Kingdom on Wednesday.

The Grecian goddess–esque gown carried an elegant empire waist with a wide cuff of fringe—a look that was complemented by a set of large white tassels that fell down the back. Like the actress’s red lace Givenchy gown from the 2015 Oscars, Wednesday's dress featured an extravagant slit; this one ran down Pike’s left side. However, she didn't wear the dress by itself: the Gone Girl star opted to wear a set of black tuxedo pants beneath it, giving a modest but innovative edge to her red carpet ensemble.

Rosamund Pike - Embed
Credit: Mike Marsland/WireImage

Pike otherwise kept the rest of her look simple and wore her blonde strands in a low bun and matched a pair of strappy black sandals to her trousers, which had a statin-style stripe down each leg.

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Classy and sophisticated, yet inspired: That's exactly what we like to see.