Deandra "Sweet Dee" Reynolds is a fictional character on the FX television series It's Always Sunny in Philadelphia, portrayed by Kaitlin Olson. Dee was the only major character in the show to be conceived without an actor in mind. She was originally portrayed by Jordan Reid (Rob McElhenney's girlfriend at the time) in the unaired pilot. Although she was originally written to be a female voice of reason, Dee's character quickly became an equal participant in The Gang's illicit and morally questionable activities once Olson was cast.