Reality star Billie, who is expecting her first baby with long-term boyfriend Greg Shepherd, was joined by her sister Sam and close friends for the celebration.
Billie isn't due to give birth until the summer but she decided to toast her happy baby news with her co-stars at Nu Bar in Loughton on Thursday (13 February).
Billie's sister and Celebrity Big Brother star Sam came along for the party along with best friend Ferne McCann, James 'Arg' Argent, Elliott Wright, Dan Osborne and Lewis Bloor.
Also joining them were TOWIE's current lovebirds Jessica Wright and boyfriend Ricky Rayment, as well as James Lock and his girlfriend Danielle Armstrong.
The group posed together for a selfie, with Danielle simply captioning the snap: "#PowerCouples #Essex."
Showing off her baby bump in a black lace dress, Billie later cuddled up to boyfriend Greg - who has already filmed his first scenes on TOWIE.
Billie looked elegant in her black lace outfit, which featured a front cutout, sheer sleeves and a high neckline.
The party was an enjoyable night, especially for Elliott and Ferne, who decided to reenact current American comedy film, The Wolf of Wall Street.
Ferne, who wore a two-piece red outfit, recreated one of the scenes made famous by Leonardo DiCaprio and Margot Robbie.
Billie managed to capture the moment, telling fans on Twitter that Ferne and Elliott's impromptu scene was "hysterical".
The new 11th series of TOWIE will return to our screens next week. This will be the first of three instalments this year, as show bosses already confirmed that a twelfth and thirteenth series will air before the end of 2014.
TOWIE will return to our screens on Sunday 23 February at 10pm on ITV2.
£2.49/month – that's all is costs for 4 issues of the REVEAL early edition. Gossip too good to wait for! Subscribe today!
See who else has announced baby news this year:
Copyright: WENN Lexie Appleby/Future Image/Bridow/Instagram