The likes of Lucy Mecklenburgh, Ferne McCann, Jessica Wright and Sam Faiers attended Lewis' birthday, which was filmed as part of the show's series finale.
The cast certainly bowed out in style and most of the girls appeared to have channelled the look of Dynasty star Joan Collins, as they posted photos of their makeover to Twitter and Instagram.
The girls looked fashionably fierce in bold and colourful dresses and jumpsuits, as they rocked a choice of pearl and diamond accessories. We're also loving their bouncy curls and voluminous hair!
While Billie sparkled in a blue sequin gown, Ferne looked sophisticated in a black figure-hugging dress, while Jess wore a plum dress accessorised with a furry shawl. Captioning the snap, Jess simply said: "80s girls."
In one photo, Sam and Ferne pull off their best pout on the way to the venue. Captioning the photo, Ferne said: "@samanthafaiers1 #lips #80s #sunday #girls #towie #dynasty #power."
Meanwhile, Lauren Pope showed off her toned abs in a black crop top. She teamed her outfit with black trousers and a blazer, and rocked a slick of red lipstick with smoky eye make-up.
Similar to Lauren, Jasmin Walia also went for a top and trouser combination, while her best friend Abi Clarke sported crimped hair as she wore a gorgeous cobalt blue jumpsuit. Frankie Essex also looked stunning in a silk grey jumpsuit.
It seems like it was only yesterday when we saw the group jet off to Vegas, where they kick-started what has been a rather explosive series!
Jess tweeted last night: "That's a wrap ladies & gentleman! What a series hope everyone enjoyed it thanks to all of your lovely comments throughout. Lots of love xxxx."
Teasing the upcoming episode, birthday boy Lewis added: "What an unbelievable night we have just had. Seriously looking forward to watching this one back ppl! #Finale #TOWIE."
No need for fans to worry though, as the cast will be back in December for a Christmas special!
TOWIE continues on Wednesday 13 November at 10pm on ITV2.
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