The pretty reality star shared her happy baby news with fans on Twitter this weekend, as she prepared for her baby shower.
And, needless to say, plenty were rather surprised she'd kept it secret for so long!
Danni broke her pregnancy news by tweeting today: "Can't believe it's actually my baby shower today. The last 8 months have gone so quickly can't wait to meet my bubba."
Her announcement prompted scores of congratulatory tweets from fans. "Congratulations on your baby news!" wrote one. "Won't be long and the little one will be here! Cherish every minute!"
Danni celebrated her baby shower with family and friends, including TOWIE's Lydia Bright and her mum Debbie, earlier today. The pink-themed bash for her baby girl included a pink chocolate fountain. Um, yum! It also had that celebrity must-have, a photobooth, and a pink sweetie cart, not to mention scores of balloons, sweet treats and other party favourites.
There were even personalised baby scan photo sweets for guests to take home.
The mum-to-be looked beautiful, showing off her baby bump in the Positano Maxi from Nightcap Clothing, available for £325 from Spotted On Celeb.
At the end of the day, Danni tweeted: "Thank you everyone who came to my baby shower my baby is a lucky girl."
Danni's pregnancy announcement came after she enjoyed a romantic weekend with her boyfriend, who surprised her with tickets to see The Bodyguard musical in London on 29 May. She tweeted: "Having the best date night with my baby boy."
Lucky lady! Congratulations to Danni!
The starlet announced last year that she was taking a break from TOWIE to focus on other business projects, including launching her own restaurant in Essex.
Danni is the second TOWIE star to announce a pregnancy this year. Billie Faiers revealed in January that she and partner Greg Shepherd are expecting a baby girl in June.
Celebrities who announced pregnancies in 2014 in pictures:
Copyright: WENN Lexie Appleby/Future Image/Bridow/Instagram