Cara, who is 22 weeks pregnant, is expecting a child with her boyfriend Daniel.
Cara's baby joy comes six months after the couple suffered a traumatic late miscarriage.
Her best friend Billi Mucklow, who gave birth to baby son Arlo on 15 June, was one of the first to congratulate to happy couple.
Billi said: "So excited and happy for @carakilbey. Can't wait to meet this bubba and spoil him or her with kisses #22weeks #BumpyLove #ArlosBestie."
Plenty of past and current TOWIE stars also sent their well-wishes. Lydia Bright's mum, Debbie, said: "Huge congratulations @carakilbey big hugs to you love all the Brights. You are going to be a fantastic Mum."
Maria Fowler tweeted: "Congratulations Cara, I'm so happy for you. You really deserve to be happy."
Meanwhile, Lauren Pope said: "Big congratulations to the lovely @carakilbey on such amazing news!"
After being inundated with kind words, 28-year-old Cara simply said on Instagram: "Thank you everyone for all your messages."
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