Heading into London, Cara joined her BFF Billi Mucklow, Lauren Goodger and a slew of their friends for lunch, and while out, the girls couldn't resist taking a few snaps to share to Instagram (of course).
In one, Billi cuddled up to the birthday girl, highlighting Cara's blossoming bump by placing her hand on her stomach. While she looked lovely in a dropped hem dress, tights and boots, Cara cut a gorgeous figure in a black dress and longline waistcoat.
Both girls shared the same photo to their Instagram feeds, with Billi gushing alongside her post: "My Special Girl And Special Bump @carakilbey."
In another photo, shared by Lauren, the former TOWIE star can be seen looking oh so glam as they posed with their pals. And enjoying every minute of their girly reunion, Lauren (who recently celebrated her own birthday with boyfriend Jake McLean) told fans their fun-filled day out was very much "needed".
"Girls day - #needed," she wrote. "Happy Birthday @carakilbey."
She, Billi and Cara starred in four series of The Only Way Is Essex together and have remained close friends following the show. While Lauren was a show original, Billi and Cara both joined the cast back in 2011, for series three.
The girls' day out comes after Cara recently announced she is pregnant.
The starlet is expecting a child with her long-term boyfriend Daniel. Currently 22 weeks pregnant, Cara's baby news comes six months after she and Daniel suffered a traumatic late miscarriage.
Her best friend Billi (who became a mum herself back in June) was one of the first to congratulate Cara on her baby joy, tweeting: "So excited and happy for @carakilbey. Can't wait to meet this bubba and spoil him or her with kisses #22weeks #BumpyLove #ArlosBestie."
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