Jeff Bezos and Lauren Sanchez grin from ear-to-ear as they leave VERY star-studded engagement party after celebrating alongside A-list pals like Kim Kardashian, Robert Pattinson, Oprah, and Miranda Kerr

Lauren, 53, and Jeff, 59, who got engaged in May, seemed in high spirits, grinning from ear to ear as they exited the celebrity-filled bash on Sunday evening.