Sweeney was among the A-list guests who attended the star-studded ceremony, which also included sisters Kim and Khloé Kardashian, their youngest sisters Kendall and Kylie Jenner and family matriarch Kris Jenner;

On Saturday, the stylish “Euphoria” star headed to Jeff Bezos and Lauren Sánchez’s post-wedding pajama party in Venice, Italy, wearing a black lace gown by Galia Lahav that accentuated her bust. She wore her blond tresses down in long, loose waves and paired the glam look with minimal jewlery.