In the end, the pairing of Monica and Chandler ended up rivaling that of the show's core romance, Ross and Rachel. It altered the show's dynamic, but didn't ruin it. This was no small feat: Most shows have trouble managing one big couple (see: New Girl ), let alone two. And even Friends didn't make every coupling click: Joey and Rachel flirted with a relationship toward the end of the show's run, but the two didn't go all the way. ("They ultimately did feel more like a brother/sister relationship," Silveri says.) Monica and Chandler, however, just worked — and Silveri believes that success was a critical component to the show's ultimate longevity. "If you didn't have a Monica-and-Chandler relationship, if the center of Friends had remained Ross and Rachel, you would've seen a much shorter shelf life for the show," he says. "Without Monica and Chandler, it ends three years earlier. I don't owe my whole house to them, but at least two bedrooms and a bath are because of them."