Well, horse's ears would have just been weird, right?!
The former Made In Chelsea star turned many heads on Tuesday (3 November) when she joined celebrity fashion stylist Louise Roe at the Melbourne Cup in the scorching Aussie sunshine.
And could that headband be any more stunning?
Dressed in a beautiful cornflower blue Dion Lee dress and strappy Saint Laurent Tribute heels from nearby Melbourne boutique Miss Louise, Millie looked gorgeous.
And instead of opting for the usual 'race day hat', we love that she upped her game with a pair of amazingly ornate bunny ears atop her perfectly coiffed head!
"Loving my @viktorianovak bunny ears," Millie Instagrammed, along with some sunny snaps from the day.
Made from what looks like tiny leaves of silver, we're in love with this headpiece from Australian milliner to the stars, Viktoria Novak.
Jealous? Us? You're not kidding.
And after Paris Hilton and Nicole Richie both rocked kitty ears headbands this summer, we're feeling a definite ear moment coming on!
To get a similar, although nowhere near as luxe look, head to the high street for some cute cat ears headgear. We love the Cats Ears Pearl Alice Band, £8, Accessorize and Crystal Cat Ear Alice Band, £3.99, New Look.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!