The TOWIE star oozed sex appeal in a dramatic black gown with a plunging neckline and thigh high split.
We love this look!
Also, how gorgeous is that blue lining on the dress, adding a little bit of colour pop to her ensemble?
While The Only Way Is Essex isn't nominated for an award this evening, no doubt Jess will be throwing her support behind sister-in-law Michelle Keegan, whose BBC drama 'Ordinary Lies' and former soap Coronation Street are both in contention.
Michelle's at the event with husband Mark Wright, Jessica's brother, who celebrated his birthday today.
The NTAs air tonight at 7.30pm on ITV.