To the Wonder costars Rachel McAdams (with newly dyed red hair) and Olga Kurylenko offered up a cool discourse on light vs. dark cocktail dressing at the film's LA premiere last night. We love a softer hue at night — when done right — and there's really no better person to champion the cause than Kurylenko. The brunette starlet took a break from her Oblivion promo tour duties and chose a light-blush-toned, high-low-hem dress for the occasion, finishing it off with a matching satin clutch and nude sandals. Meanwhile, McAdams went with a black lace number that fit a more traditional nighttime styling bill, albeit with a sexy curve-hugging, skin-revealing twist. With outfit breakdown at hand, it's time for you to decide who did party fare best last night.