The petite actress arrived in a midnight blue off-the-shoulder Stella McCartney dress, which she teamed with a neat long blonde bob and leg-lengthening nude heels.
And while we couldn't wait to hear about her red carpet look and her favourite outfits of all time, Reese proved she isn't as interested in her style as we are...
Watch the video at the top of the page to see what we mean.
See the full red carpet video with the films actors (including the gorgeous Robert Pattinson) here.
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