Cardi B gave Offset a Rolls-Royce Wraith and asked him to drive her everywhere to show off

It may have been Offset's birthday, but the night was all about Cardi B!The "Bodak Yellow" rapper slayed the fashion game at her fiance's birthday party, a Met Gala-themed soiree called "The Set Gala," held at The MacArthur in Los Angeles on Wednesday.Cardi stunned in a white-and-gold asymmetrical, semi-sheer Nicolas Jebran dress that was covered in diamonds and Swarovski crystals. She wore her dark, pin-straight locks down, and accessorized with long fringe earrings, strappy gold sandals and, of course, her jaw-dropping engagement ring.Offset -- who turned 26 on Thursday -- was pretty dapper himself, blinging out in a sparkly jacket, layers of chains and black leather pants. Appropriately, he not so shyly deemed himself and his lady "R O Y A L T Y" on Instagram.

Thaddaeus McAdams/Getty Images

Thaddaeus McAdams/Getty Images

Tons of the couple's celeb friends turned out for the occasion, including Offset's fellow Migos members, Quavo and Takeoff, Pharrell, Big Sean, Ashanti, G-Eazy, Teyana Taylor and Shawn Ross.