"Sometimes I hold Milo and I literally feel that my heart is going to blow up with this overwhelming feeling of love," Tyler, 28, told U.K.'s Harper's Bazaar of her 17-month-old son with husband Royston Langdon. Which makes balancing a social life a challenge: "You are so in love with your baby that when you get to go out, you're like, 'Oh, I miss him! What's he doing? Maybe we should go home.' "