Fancy Dress Halloween Events In London

By Scarlett Welch • Junior Editor, DesignMyNight Food, drink and events expert with 4 years in editorial and Media & Journalism MA. Last updated on 30th March 2026

Whether you fancy cruising around the city like a cat, demonically dancing 'til the early morning, or spending your witching hours sipping on creepy concoctions, we've got the party for you. From ghoulish gallivanting in the West End to prancing like a pumpkin in creepy ballrooms, these are the very best fancy dress Halloween events in London.

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Alcotraz London: Cell Block Two-One-Two

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@ Alcotraz Penitentiary: London on Various dates from Friday 10th April 2026

Over at Alcotraz, they have your fancy dress sorted for you; a bright orange prison jumpsuit. Whack it on and head inside the secret jail, where you will sneak contraband liquor in past the warden. The best bit? The guards will then shake you up tasty bespoke cocktails.