Frankie was joined in London by Lauren Goodger, Cara Kilbey and Billi Mucklow, making up a mini reunion especially for the occasion!
Wearing a red and black bodycon dress with plunging neckline and cutout sides, the birthday girl was all smiles as she posed with her pals outside trendy restaurant SKT.
Billi, who quit TOWIE to open her own Bikram yoga studio, also chose to wear red and black but opted for a dress with a flared skirt.
Cara also showed off her figure in a monochrome sleeveless frock, adding a pop of colour with a red clutch bag. All three ladies wore black heels.
Lauren, meanwhile, arrived separately and was rocking a khaki jumpsuit with sheer sleeve detail and metallic wedges and bag. She also gave the cameras a grin as she headed inside.
Frankie actually turns 26 on Monday (16 September) and she recorded a short video for fans before heading out with the girls.
Watch Frankie's video here!