Minnies Boutique owner Billie cut an elegant figure in the long-sleeved scarlet gown with plunging neckline and thigh high split on Monday evening (3 February).
Billie uploaded the picture to Instagram, where it was retweeted by her long-time boyfriend Greg Shepherd, who added the caption: "Lucky boy!"
Essex star Billie revealed in January that she and Greg are expecting their first child together later this year, making her the first TOWIE cast member to announce a pregnancy.
(Her co-star Dan Osborne was the first cast member to become a parent after his ex-girlfriend, who doesn't appear on the show, gave birth to their son Teddy in December 2013.)
Billie and Greg escaped the dreary weather in the UK for the Maldives sunshine at the end of last month but, like all good things, their fun in the sun is about to come to an end…
There is a bright spot for Billie, however, as heading home means she'll be reunited with younger sister Sam Faiers who is now out of the Celebrity Big Brother house.
Sam entered the UK's most famous house at the start of January, meaning it's been nearly a month since the famously close siblings have seen each other in person.
It's also been a difficult time for Sam, who finished fifth on the show, as she fell ill during her time in the house and was taken to hospital twice for tests and scans. She hasn't publicly revealed the results yet.
Billie tweeted last night: "Last day of holiday ... On the bright side I cannot wait to get home and see my sister @SamanthaFaiers and give her a big cuddle."
We'll see the sisters on our screens again this month when the eleventh series of TOWIE starts on ITV2. No doubt Billie's pregnancy will play a big part in this year's storylines!
TOWIE will also return for another new series in the summer, followed by a third lot of episodes in autumn.
More celebrities who have announced pregnancies in 2014 below!
Copyright: WENN Lexie Appleby/Future Image/Bridow/Instagram