The TOWIE star gave fans a glimpse at her outfit for the day on Monday (20 January) by posing in front of the mirror in her bedroom for a quick snap.
After spending the weekend dressed down in a cosy jumper at Minnies Boutique, she went for full-on glamour today in an outfit that wouldn't look out of place in a night club.
Billie announced earlier this month that she and long-time boyfriend Greg are expecting their first child together, although the draping fabric of her white top today hid any hint of baby bump.
Billie has been spending her day drumming up support for sister and TOWIE co-star Sam, who is currently cooped up inside the Celebrity Big Brother house.
The blonde siblings are known for their close bond so it's no surprise Billie was furious to learn Sam is up for eviction at the next live show. Tweeting after she found out, she said: "Cannot quite believe @SamanthaFaiers is up for eviction ... And what pathetic reasons for nominating her !!! #Sam2WinCBB #CBB xxx."
Billie's glamorous outfit was ahead of her appearance on Celebrity Big Brother's Bit On The Side this evening, where she'll no doubt be encouraging viewers to keep her sister in the house.
She's just back in the UK following a romantic mini-break to Paris to celebrate her birthday.
Celebrities who have announced pregnancies in 2014 in pictures!
Copyright: WENN Lexie Appleby/Future Image/Bridow/Instagram