Condor, star of Netflix's To All the Boys I've Loved Before, wore a printed Jacquard fabric mini dress with puffy cap sleeves, paired with burgundy pointed heels and Swarovski jewelry.
Montag, who can be seen soon on MTV's The Hills: New Beginnings, walked the red carpet in a $4,200 navy wool and silk belted '70s-style Gucci jumpsuit.
Moss, star of Hulu's The Handmaid's Tale, channeled a real Mother of Dragons with a long sleeve, printed black and silver mini dress.
Shazam! actor Zachary Levi is hosting the 2019 MTV Movie & Movie Awards, which is taking place in Santa Monica on Saturday. The ceremony will air on MTV on Monday at 9 p.m. ET.