The Fifty Shades Darker star (in Christian Dior) and the Vanity Fair editor co-host the party at Delilah in West Hollywood.
The Atlanta star really ballooned up during the party.
The Black-ish actress in Chanel and the Search Party star show of their colorful ensembles.
The engaged couple gets flower-bombed.
The 15-year-old goes glam in Giambattista Valli Haute Couture 11.
The actress looks chic in a skin-baring blazer from Elizabeth and James.
Talk about a blonde bombshell! The actress rocks in Elizabeth and James.
Pirates of the Caribbean: Dead Men Tell No Tales actor and the Evil Dead actress get close.
The Tony winner, who will be performing at the Governors Ball after the Oscars, sits one out in her J. Crew ensemble.
The besties smize for the camera.
The Fences actor hangs with the Fifth Harmony singer.
The Modern Family actress has a leg up on everyone else at the party.
Sister act!
The Westworld actress comes between the beauty vloggers.
The star is sheer elegance in a Vatanika dress.
The newly married couple makes the party rounds.
MORE PHOTOS: Marc Malkin's Instagram Gallery