Katie sent the paparazzi into overdrive when she stepped out in this luxe, velvet effect maxi dress by one of her all time favourite designers, Zeynep Kartal, which featured a red carpet sweeping train (oh, the glamour!) and slinky sleeves to boot.
Hands up if you're just a little jealous of her teeny tiny waist?! Guilty.
Katie is used to making waves in all manner of princess-inspired dresses (she recently channelled Frozen's Elsa - and Instagram went wild!) and she oozed an unprecedented amount of sophisticated chic as she glided past guests in the beautiful trailing frock which she teamed with a boxy clutch bag.
Like TOWIE's Lydia Bright, also at the event, Katie rocked a classic up-do complete with a sweeping side fringe and she gave us heaps of contour envy as she posed for pictures before nabbing a seat inside the swanky Grosvenor House Hotel.
She offset the look with lashings of silver rings, an autumn-inspired, berry-toned mani and a subtle smokey eye.
Having proven that she is one of the most stylish celebs we know, Katie schmoozed with TOWIE's Danielle Armstrong and Georgia Kousoulou, not to mention X Factor's Nicole Scherzinger and Our Girl star Michelle Keegan.
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