Kaitlin Olson did not start her career in the Groundlings.
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
did not start her career
in the Groundlings
began her career