The presenter was barely recognisable after being transformed into a unicorn, the same look she was channelling for Jonathan Ross’ famous October 31 bash in London tonight.
However, the 36-year-old gave her stunning outfit a sexy, rock chick twist as she attended the star-studded bash alongside her husband Dan Baldwin.
Holly’s ample assets were impossible to miss as she arrived, after ditching her white furry trousers that she first showed off on the ITV daytime programme.
Instead, the mother-of-three highlighted her slender pins in skintight black jeans and saucy, over-the-knee suede boots.
Pride of Britain 2017: Holly Willoughby risks knicker flash in gown
Holly Willoughby transforms into breathtaking unicorn for Halloween
Holly Willoughby updated her This Morning costume for Jonathan Ross' Halloween party tonight
Holly Willoughby gave it a rock chick vibe while her spouse Dan Baldwin went as the Tin Man
Celebrities do Halloween
Tue, October 31, 2017
HAPPY HALLOWEEN! Here's a round-up of the best celebrity Halloween fancy dress outfits, old and new!
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Holly Willoughby and Phillip Schofield dress up for Halloween
Holly also covered up her white top with a studded leather jacket, but her lengthy, multicoloured tail was still on show.
The TV favourite still had a silver horn, curly pastel tresses and an all-white face with dramatic eye make-up.
Holly’s spouse, meanwhile, opted to go as the Tin Man from Wizard of Oz and he also boasted a very impressive get-up.
Claudia Schiffer showed off her figure in a pink bodysuit
Dame Joan Collins channelled period grab with her husband
The annual event held at the chat show star’s home was also attended by the likes of Frank Skinner, Michael McIntyre, Ed Sheeran, his girlfriend Cherry Seaborn and Claudia Schiffer.
The latter, 47, showed off her supermodel physique in a clingy pink bodysuit, complete with gold detailing and a bow on her head.
Dame Joan Collins, 84, channelled the past in a period black dress and over-sized blonde wig as she partied with her spouse Percy Gibson.
This Morning airs weekdays at 10.30am on ITV.