The model and novelist, who is a regular at the Met Gala, chose to make her inaugural afterparty, the Après-Met Gala Soirée, for this year's largest night in fashion.
Ratajkowski changed into her third outfit of the night, a blindingly sparkly, chainmail violet mini dress with a plunging neckline, which she paired with black pointy-toed heels, a silver slinky purse, and a handful of bangles and rings to accessorise, for the event, which she hosted with stylist Carlos Nazario, model Paloma Elsesser, designer Raul Lopez, and photographer Renell Medrano.
She flaunted the tiny bodice, which was designed by co-host Nazario, on Instagram and gave followers a sneak peak into her night, which included cocktails in the lift and photo sessions elsewhere.
Her afterparty ensemble, in which she socialised with Precious Lee, Kendall Jenner, Imaan Hammam, Odell Beckham Jr., Emma Chamberlain, Adut Akech, and others, was, however, simply the final look of her Met Gala moments.
Ratajkowski left the Gala in a black sheer corset top, matching sheer skirt, black lingerie, layers of pearl and silver chain jewellery, and a custom personalised Dilara Findikoglu chain belt with "EmRata" on it, which she arrived to her afterparty in, showing an up-close look at the 'fit in an Instagram post.
To the big event, however, the actress wore a Tory Burch gown with a plunging neckline and a firm crisscross design that encircled the loose tulle.
In terms of glam, she wore baby fringe for the rest of the night, along with a large black bow and a dramatic smokey eye. Ratajkowski wore jewels by Fred Leighton and Ana Khouri on the red carpet, including a diamond Philippa earpiece, a diamond Philippa ear cuff, and a custom diamond drop earpiece.