The TOWIE star is expecting her first baby with boyfriend Greg Shepherd and glammed up for an evening out on Friday night (7 February).
Billie teamed her LBD with a black jacket, featuring pretty silver embellishments on the shoulders.
Proving that she isn't yet suffering from swollen ankles, Billie was also rocking a pair of chunky heeled strappy sandals.
The mum-to-be posed for a selfie in the mirror at home before heading out and posted it on Instagram on Saturday. She simply said: "Last night ..."
Billie's fans were quick to respond, with one telling the star: "Actually beautiful."
Last week, Billie joined her sister Sam and their co-stars in filming the advert for the new series of TOWIE.
The 11th series of the reality show is due to kick off later this month and Billie's pregnancy will feature - and it's been hinted that her boyfriend Greg may make his first appearance too.
Last month, Greg whisked Billie off to the Maldives for a 'babymoon' and the couple spent their time relaxing on the beach and feasting on yummy food.
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