Macaulay Culkin and Brenda Song are generation-defining child stars who rose to fame as Kevin McCallister and London Tipton. Several decades later, the two also happen to be madly in love. For Cosmo’s Love Issue, the two open up about their relationship in a way they never have before

Have you heard? London Tipton is marrying Kevin McCallister. It’s the crossover of your after-school appointment TV dreams, the joining...