Taking to Instagram, Ferne posted a new holiday snap of herself kissing Billie's growing bump. She told fans: "Dubs with @billiefaiersofficial & bump. #happytimes"
Ferne added a love heart emoji alongside her post, that showed herself and Billie donning bikinis in the sunshine.
Both girls were fresh-faced and sporting an impressive bronzed glow and while Billie stood to the side to showcase her blossoming tum, Ferne puckered up and planted a kiss on her stomach. So cute!
Within two hours of posting, Ferne's photo with Billie has been liked nearly 30,000 times, with many fans passing on their congratulations to Billie.
Their appearance in Dubai comes after Billie recently confirmed she is having a baby boy.
Billie announced news she and fiancé Greg Shepherd are expecting a son in OK! magazine. She said: "We're in complete shock. Greg and I always thought we'd just have girls and everyone around us put that in our heads, too. We can't stop smiling."
Billie and Greg are already parents to daughter Nelly, two, meaning their little girl will now get to be a big sister - and Sam Faiers' son Paul (Billie's nephew) will also have a playmate!
Speaking to Daily Mail, Billie had previously said she "would love to have a boy" after getting to see sister Sam with her son.
She said: "I always thought in my head that I'm always going to have girls but now that I've seen Samantha with Paul, I would actually love to have a boy as well. It would be so nice to experience having one of each but on the flip side, it would be really nice for Nelly to have a sister as well because then it would be kind of like how Samantha and I were."
Sam, meanwhile, exclusively told Reveal she is so excited for Billie to be expecting again.
She said: "I'm so excited for there to be another baby in the family. It feels like we've just been waiting for Billie to make a pregnancy announcement."
Billie first announced she is pregnant again in September. Her baby news came a month after she decided to quit TOWIE.
Billie bowed out of The Only Way Is Essex in August, but is currently back on our screens thanks to Sam's reality show The Mummy Diaries which airs on ITVBe.
Like this? Don't miss out! Make sure you're following Reveal across Twitter @RevealMag / Facebook @Revealmagazine / Instagram @revealmagofficial