Mila Kunis and Ashton Kutcher's pregnancy and engagement news has fans of That '70s Show swooning over the onscreen couple's real-life love. The pair first met on the set of the show in 1998, when a 14-year-old Mila was cast alongside 20-year-old Ashton. On screen, the duo shared a silly, adorable chemistry, and it was later revealed that Ashton was Mila's first kiss. In 2001, the actress said, "I was like, 'Oh, he's so cute; it's the Calvin Klein model!' Then I was like, 'I have to kiss him?' I was so nervous and uncomfortable. I had the biggest crush on him." Well, it looks like that connection was the real deal, so to celebrate the pair's engagement, take a look at the Kelso and Jackie romance that led to Ashton and Mila's happily ever after.