And if her stunning, floor-length red lace dress wasn't enough to turn heads, check out Jess' braided, bedhead hair. Utterly gorgeous.
Jess joined her brother Mark, dad Mark Snr and mum Carol on the red carpet at the Empire Cinema in London's Leicester Square for the latest movie in the Rocky franchise.
It was the family's first public appearance since the funeral of their beloved Nanny Pat which was held on Friday in Essex.
Rocky star Sylvester Stallone, Thandie Newton and Fleur East were among other celebrity guests who braved the cold weather for the premiere, but when it came to head-turning glamour, Jess, 30, was the hands-down winner of the evening.
Jess wore a figure-skimming deep red lace dress which showed off her amazing curves, and she accessorised her look with very few accessories and a nude, metallic clutch.
Her make-up was total Essex glamour – nude lips, bronzer, contoured cheeks and smoky eyes with lots of lashes – and her hair was yet another belter of a do, created by Jess' go-to hair queen Hannah Wieteska.
To copy her look (which we're already planning to do this Friday night), apply volumising mousse to damp hair then blow-dry it with a diffuser to get plenty of root volume.
Then, it's all about using your hands to create this super-sexy, slightly dishevelled plait.
First, sweep your hair over to one side then scoop a section from either side of your head – at around ear level – and loosely roll each section to the centre of the back of your head. Pin each section, making sure you tuck the ends under each other, then spritz with a bit of hairspray to hold into place.
Next, grab the rest of your hair and work it into a loose, chunky braid, fixing the ends with a covered band, then covering your band by pinning a small strand of hair around it.
To finish, gently tug each section of your plait to mess it up a little and mist with another coating of hairspray.
We love Silvikrin Classic Hairspray in Maximum Hold, £32.9, superdrug.com.
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