Mila Kunis and Ashton Kutcher took their love off screen almost two years ago, and now the former That '70s Show costars are engaged and expecting their first child together! The couple has showed off adorable PDA throughout their relationship, and the common denominator between many outings is one accessory: Ashton's many baseball caps. Scroll through some of their cutest photos, including courtside kisses (even on the kiss cam!), walking down the aisle for their siblings' weddings, and matching clothing. And if you can't get enough of them, check out how Kelso and Jackie's love story came true, transforming into a sweet real-life romance.