From comedic offerings to original interpretations, it's an annual showdown for who can come up with the best Halloween costumes.
But one star who didn't seem to get the memo on Tuesday night was Melanie Sykes, who attended Jonathan Ross' spooktacular bash with a lackluster costume.
Though the 47-year-old TV presenter seemed to be channelling the gothic makeover given to character Eleven in Stranger Things 2, she was still upstaged by a male companion who went to town with his costume.
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Where's your costume? Melanie Sykes, 47, seemed to forget her get-up for the Jonathan Ross Halloween bash on Tuesday night
Mel rocked a simple black overcoat and distressed jeans in her look, with her brunette locks styled into tight braids.
The Big Breakfast presenter had a simple black and white scarf tied around her wrist, along with a smoky eye and red lip.
Mel was accompanied by a mystery male companion for the party, who put on a sophisticated display as a smartly dressed werewolf.
Mystery: Melanie was upstaged by a hunky male companion, who came as a sophisticated werewolf
Quick fix: Melanie rocked a