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Jennifer Aniston and Justin Theroux were quite the coordinating couple in on-trend black-and-white ensembles at last night’s 26th American Cinematheque Awards in Beverly Hills. The recently engaged stars were on hand to honor fellow actor Ben Stiller, who the lovebirds greeted just after walking the red carpet. Aniston gave Stiller a friendly hug—the two co-starred in 2004′s Along Came Polly—before revealing to InStyle.com the designer of her dress as she passed by: “It’s Valentino!“

Plus, see who else partied last night!

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— Lindzi Scharf