<P> Kaitlin Willow Olson ( born August 18 , 1975 ) is an American actress and comedian . 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 . </P>
<P> Kaitlin Willow Olson ( born August 18 , 1975 ) is an American actress and comedian . 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 . </P>
who plays d on it 's always sunny
who plays d on it 's always sunny
Kaitlin Willow Olson
Kaitlin Willow Olson