Mum-of-one Billie has starred in TOWIE since the beginning but revealed her plans to take an extended break from the reality series last month.
Since making her debut, Billie has welcomed daughter Nelly into the world and the tot has starred in many episodes alongside her mum.
But tonight, the pair will be seen waving goodbye their co-stars one last time as series 18 comes to close.
During the finale episode, Billie will be shown announcing some big plans to her pal Lydia Bright while chatting at Bobby Norris' circus-themed 30th birthday party.
But exactly what they are remains to be seen! The star and her little girl will then been seen walking off into the distance together. Sob!
Earlier today (16 August), we revealed how Billie had told us that her time on the show "is done".
Most of her pals - including her sister Sam Faiers - have departed the ITVBe series and she feels it is also time to move on.
"Others have gone on to great things. So, I suppose it's kind of nice to start a new chapter of my life. I feel like I should try something different," she told us.
Billie and her fiancé Greg Shepherd are also hoping to expand their brood, having previously admitted they would like to be expecting baby number two by the end of the year.
Watch Billie's final scenes in TOWIE, 10pm, ITVBe, Wednesday 17 August.
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