Sienna Miller Just Wore Her 2006 Met Gala Minidress for a Night Out

We can only imagine the fashion treasures lurking in the surely vast wardrobe of Sienna Miller. This is a woman who has been dressed by the biggest designers on planet fashion for well over a decade, playing muse to many and having more than a few opportunities to really bring out the big guns. The Oscars, Cannes, fashion week, countless movie premieres, numerous cover shoots… You name it, Miller's had a fabulous dress for each and every moment of her career.

Over the past few months, we have also been truly in awe of her casual attire too, with the actress looking effortlessly cool in NYC on school runs in her low-key designer garments—many of which have been worn on repeat and in various combinations. Turns out she's just as keen on shopping from her own closet when it comes to night-out outfits: For a Christmas get-together with Brit legend Noel Gallagher, Miller dug into her own archive and pulled out a glitzy little gold number that we noticed as being rather familiar.

This post originally appeared on Who What Wear UK. Next up: some very good cold-weather fashion tips.