The former TOWIE star attended the launch of Hogwarts in the Snow at Warner Bros. Studio Tour London - The Making of Harry Potter on Thursday night (14 November).
Lydia got the chance to explore some of the original sets including the iconic Great Hall and Gryffindor Common Room, and had a first glimpse of the Hogwarts castle model, which was covered in a blanket of snow. Perfect for any Harry Potter fan!
In one photo, Lydia, who tasted the famous Butterbeer and munched on some mince pies, looked to be in full swing as she waved her wand to carry out some spells.
The boutique owner also looked effortlessly chic and wrapped up warm in a grey tweed coat from her own Bella Sorella collection (Zigzag Coat, £110), teamed with black trousers and black cut-out heels.
She accessorised with a large red suede clutch bag, and showed off her flowing brunette locks under a black hat.
Also in attendance was Britain's Got Talent judge Amanda Holden, who treated her daughter Lexie to some festive fun. Kate Garraway, Jamelia, Rick Edwards, Scott Mills and Matt Edmondson also joined in on the tour.
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