It's no surprise that at one of the biggest awards shows of the year, stars are bound to run into exes (eek!) and former costars (yay!). See the best reunions of the night from beloved movies and TV shows including Moulin Rouge,

The actors became screen kin again this year with McGregor's daughter Esther Rose playing Kidman's daughter in "Babygirl."

The "Perfect Couple" actress stunned alongside her third oldest child, wearing a gray blazer over a blue collared shirt, a pair of black slacks and pointy-toed burgundy heels.