Only because she's hardly recognizable!
The low back on Kate's dark navy mini dress is absolutely flawless, making her outfit seem fun and flirty.
Too bad her pulled-back hair and dark lipstick makes things a little too dramatic for the red carpet.
Her art-deco Fred Leighton jewels are absolutely gorgeous, though.
What are UR thoughts on Kate's ferociously feathered flapper dress??
Look (below) to see the completed look!
[Image via Getty Images.]