Taking to the photo-sharing app, the soon-to-be mum-of-two put her stomach on full view and we can't believe just how big Imogen's bump is getting.
It turns out neither can she, as Imogen wrote alongside her snap: "I think it's safe to say I've popped for def... #November."
And loving her pregnancy bod, she also added: "My baby belly. I [love] it."
With her whole bump completely on show, it's no surprise fans began to guess whether Imogen is having a boy or a girl judging on the shape of her tum.
Rumour has it if your baby bump sticks out in front of you, then you are destined to have a boy. If it is more spread out around your middle, then it's likely to be a girl.
While there's nothing scientific to back up such claims, that didn't stop Imogen's followers from having their say, and one user was certain she is set to welcome a son.
They said: "This is definitely a baby boy bump @imogen_thomas."
Others decided to play it safe, simply asking the former Big Brother star if she had found out the gender yet. One user asked: "Did you find out the sex?" While another commented: "So wanna know what you're having! Hope another little girl."
So far, Imogen hasn't yet revealed if she knows what she is having.
32-year-old Imogen first announced she was pregnant again in May. She is expecting her second child with partner Adam Horsley.
Imogen and Adam are already parents to daughter Ariana, two, and to reveal her baby news. Imogen shared a cute photo of herself showing little Ariana her baby scan.
She said: "Guess what?! I'm going to pop! This little Madam can't wait to be a big sister in November! She's going to be the best #novemberbaby."
Since then, Imogen has been sharing plenty of baby bump updates on social media, confessing she "loves to see her bump grow".
Us too, Imogen. Us too!
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!