The two new pals were spotted walking down the red carpet at the UK premiere of Jack Ryan: Shadow Recruit and were joined by a whole host of other celebs, including the movie's main stars Chris Pine and Keira Knightley.
But while some famous faces - such as blonde model Amy Willerton - decided to up the ante in glamorous and colourful dresses, Louise and Lucy kept things simple and understated.
Despite having a love for short frocks and flaunting her toned legs, Lucy covered up on Monday night (20 January) and wore a pair of tights with her loose-fiitting number from All Saints.
The dress featured an exposed zip down the side to give it cool edge and Lucy completed her look with some black heels, smoky eye make-up and chunky earrings.
Meanwhile, her Made In Chelsea co-star Louise arrived at the premiere dressed for rainy weather in a chic black coat with leather sleeves and eye-catching tortoiseshell buttons.
She kept her outfit super smart with a pair of black printed trousers and wore some chunky boots to toughen the look up a little.
Louise also added a pop of colour on her lips to break up the black and took inspiration from Tinie Tempah by sporting some geek chic glasses too.
The petite brunette was seen patching up her differences with feisty Lucy on the last series of Made In Chelsea, as the pair's mutual dislike for ex-boyfriend Spencer Matthews brought them closer together.
And although the two ladies are not yet BFFs, we are still a little surprised to see them getting along so well and managing to be in the same place as one another without causing a scene!
Louise and Lucy weren't the only Chelsea cast members on the red carpet yesterday, as Cheska Hull and Fran Newman-Young were pictured at the premiere too.
They both decided to go all out for the occasion in floor-skimming frocks.
What do you think of Lucy and Louise's outfits? Let us know below, as the best comment from across the website each week wins £50!
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