Kaitlin Olson began her career in the real estate business.
She began her career in the Groundlings , an improvisational group in Los Angeles , California , and had minor roles in several television series before being cast as Deandra `` Sweet Dee '' Reynolds on the FX black comedy series It 's Always Sunny in Philadelphia in 2005 .
Kaitlin Olson
began her career
in the real estate business
in the Groundlings , an improvisational group