The TOWIE star posted a flashback picture of herself taken on holiday in Dubai before she fell pregnant, and said: "Hopefully il be back to this soon ... Haha #tbt #dubai #wishfulthinking."
But Billie's also posted lots of snaps of herself right now, and we think she looks really great already!
The Essex fashionista has been rocking a super stylish post-baby wardrobe and looks very chic indeed in her go-to fashion choice - pretty dresses teamed with a high ponytail.
Thankfully, we know that Billie is a sensible lady and she won't be pushing herself to get fit while she's got a brand new little one to look after.
Meanwhile, Billie's been busy getting back to work following the birth.
Sharing a snap of herself in adorable yellow shorts and a smart shirt, Billie said on Thursday (31 July): "Busy morning meetings ... #exciting #summer2015 …"
There's no stopping this new mamma!
Speaking shortly after little Nelly arrived, Billie told how the gruelling 32-hour labour had taken its toll.
She said: "My whole body is still in shock."
Ouch! Just make sure you take it easy and don't put yourself under any pressure, Billie.
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