The royal family is feeling the Halloween spirit!

By Erin Hill
October 14, 2016 03:57 PM
Dave Benett/Getty
Credit: Dave Benett/Getty

The royal family is feeling the Halloween spirit!

While Prince William and Princess Kate delighted in some royally amazing masks on Friday, Princess Beatrice went full feline for UNICEF’s annual Halloween Ball on Thursday night.

The “Malice in Wonderland”-themed party featured a lot of whimsical costumes, but the royal’s look raised a few eyebrows.

Beatrice sported a regal black velvet top and leather skirt, which she accessorized with a dramatic cat eye mask. To add even more mystery to her festive costume, she topped it off with a platinum blonde wig.

Samir Hussein/WireImage
Credit: Samir Hussein/WireImage

While Beatrice’s costume remained a mystery (Sgt. Pepper Cheshire Cat? Feline Femme Fatale?), the newly-single princess appeared to be having a blast at the glamorous event as she mingled and posed for photos with fellow partygoers.

Princess Beatrice and her longtime boyfriend Dave Clark split in August after nearly a decade of dating.

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A friend told PEOPLE, “It is very much a break. It is amicable and mutual. They both need space after a period of ten years to see what they both want.”