Billie goes to meet close friend James 'Arg' Argent, who speaks about his recent troubles with Lydia Bright, but it seems baby Nelly makes all his troubles go away.
In scenes to be shown on tonight's series finale (30 July), Arg spends some quality time with Nelly at a park, while letting Billie in on a secret.
In sneak peek pictures, Arg, who is wearing a baby carrier, can be seen cuddling the adorable tot while sitting on a bench - aww!
Arg later plants a kiss on Nelly's head and even holds up a white parasol to provide shade. Doesn't Arg look besotted?!
In fact, Arg was ecstatic about Billie's baby news, tweeting after her birth: "OMG @BillieFaiers Yesss I'm finally a uncle! Can't wait to baby sit! So happy for you both @Gregshepherd_ x."
Reveal broke the happy news on 10 July that Billie had given birth to her baby girl with her fiancé Greg Shepherd.
It wasn't long before Nelly made her debut either, as viewers saw the tot on screen for the first time on 20 July, when she was visited by Billie's close friends Ferne McCann and Gemma Collins.
The final episode in the current series of The Only Way Is Essex airs on Wednesday 30th July on ITV2 at 10pm.
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TOWIE stars congratulate Billie and Greg on the birth of Nellie: