The big public reveal doesn’t happen until episode 14 of season five (“The One Where Everybody Finds Out”). And it’s not a romantic confession—it’s a chaotic game of chicken led by Phoebe. Monica and Chandler are trying to keep the secret, but Phoebe, who is basically a psychic octopus, senses something is off. She says, “My eyes! My eyes!” when she catches them making out through a window.
The payoff is legendary: Chandler yells, “I’m not even wearing any pants!” while Monica hides under a blanket. They then confess everything to the group. The audience applause lasted a full thirty seconds. That’s how long it takes to clap for the greatest TV couple of the 90s.