Billie gave birth to Nelly two months ago and she has already made her debut in the ITV2 reality show, appearing in front of the cameras when she just a few days old.
But after discussions with her fiancé and Nelly's dad Greg Shepherd, Billie has agreed to let their daughter star in TOWIE again - although not on a regular basis.
Speaking to Mother & Baby, Billie said: "Greg and I did have the conversation whether or not to have Nelly on the show – but I felt like I owed it to my fans and to TOWIE.
"The show is reflective of my life and Nelly is a part of my life now.
"I'm not going to have Nelly on the show all of the time - I'd rather keep her scenes little rather than often because it's more special that way and she doesn't know any different."
Although she didn't announce her pregnancy on TOWIE, Billie and Greg were shown revealing their baby's sex at a party thrown to celebrate their news.
During the series, Billie was shown having a 4D scan and regularly discussed her pregnancy with her fellow cast mates - especially as her due date neared and she became more impatient!
Baby Nelly finally made her TOWIE debut soon after she had been born and was seen in her mother's arms alongside Gemma Collins and Ferne McCann.
Are you looking forward to seeing more of Nelly on TOWIE? Tell us below, as the best comment from across the website each week wins £50.