It's hard to imagine a time when Monica and Chandler weren't together, but it took them four seasons to actually get together. From then on, it was clear that they were meant to be. Excuse us while we re-watch the one where they get engaged, the one where they get married, the one where their kids are born, etc. And no, we're not crying, there's just something in our eyes!
But Monica and Chandler are not the ultimate Friends couple. That honor actually goes to...