Charlie Day and Mary Elizabeth Ellis
Charlie Day and Mary Elizabeth EllisOn-Screen: Joining McElhenney and Kaitlin Olson on It's Always Sunny are Day and Ellis. Ellis plays Day's love interest (or, perhaps more accurately, stalker subject) "The Waitress." Off-Screen: Although they exchanged restraining orders on-screen, Day and Ellis exchanged wedding vows in 2006. Their first son Russell Wallace was born in 2011. [Photo via]