Monica and Chandler (Courteney Cox and Matthew Perry), Friends
After his plan to throw Monica off the trail by pretending that he never wants to marry — since, you know, that's just a way for the government to keep tabs on you — was thwarted by Richard (Tom Selleck), Chandler thinks she has left him for The 'Stache. But when Chandler walks into their apartment, he sees the shock of his life: Monica standing in a romantic, candlelit room. "You wanted it to be a surprise," she says, before getting down on her knees and breaking down. ("There's a reason why girls don't do this!" she says.) Chandler then gets on bended knee and finally, tearfully pops the question. Fun Fact: This episode, the Season 6 finale, was nearly the series finale because the stars' contract negotiations came down to the 11th hour.