While Justin Theroux's first few Instagram posts [1] have been slightly muted throwbacks, the actor just added a splash of color to his feed in the form of Jennifer Aniston [2]'s dress. The gown, a Spring '13 Valentino Couture creation, was one that Jen wore to the Academy Awards in 2013.

In short, it was one of her most fabulous red carpet appearances [3] of all time. Ms. Aniston's glow was undeniable, played up by sparkling Fred Leighton jewels, a metallic Salvatore Ferragamo box clutch, and, of course, her main man [4], Justin, who stood by her side [5]. Read on to see photos of Jennifer's Valentino look from all angles, along with Justin's artsy behind-the-scenes shot, which is one we've never seen before, making it the most special of all.