The Essex reality star and fashion designer, 30, joined her TOWIE co-stars at Elliott Wright's restaurant, Olivia's La Cala, on Wednesday night (23 September).
They were there to film scenes for the upcoming series of The Only Way Is Essex and help Elliott launch his brand new champagne bar within the restaurant.
Jess tweeted afterwards: "So proud of my cousin opening the champagne bar at Olivia's. It's so beautiful."
She was looking pretty beautiful herself in a vibrant green skirt and black cropped jumper. Jess usually wears her long hair all tousled and flowing, but last night she went for a chic, sophisticated updo and we are LOVING it!
Jess partied at the champagne bar with Elliott and co-stars including Danielle Armstrong, Ferne McCann and Bobby Cole Norris.
We're hoping it's a sign that Elliott will be making a cameo in the 16th series of TOWIE. He left the show earlier this year in order to move to Spain and launch his new restaurant - and we've missed him!
TOWIE returns Sunday, 4 October at 10pm on ITVBe.
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