The gorgeous star slipped on a floral minidress embellished with gold for the special occasion, teaming it with a statement necklace and a long cream gilet which we're totally crushing over.
Makeup-wise, Louise kept things simple by slicking on some eyeliner and letting her tanned skin steal the show for her birthday night out on Friday (20 March).
Accompanied by her boyfriend Alik Alfus, Louise made her way to Broadway London where she partied the night away with former MIC star Cheska Hull.
Cheska shared a series of snaps from the night, including the one of Louise about to devour a delish-looking chocolate birthday cake.
Cheska added: "Birthday Girl! @louiseathompson @broadway_london xx"
She also cosied up to Louise's bf Alik. Isn't he just the smiliest guy you've ever seen?!
Louise and her man have been together since last summer, when they met while the Made In Chesea cast were filming in New York.
They've been an item ever since and we think they make a super cute couple.
Alik even bought Louise roses last week. Top marks, Al!
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