Kaitlin Willow Olson is an American actress, comedian, and producer. She began her career in The Sunday Company at the Groundlings, an improvisational theatre and school in Los Angeles, California.

Are Dee and Mac married in real life?

Fans of It's Always Sunny In Philadelphia probably know that Kaitlin Olson and Rob McElhenney, who play Dee and Mac, are married in real life. ... Mac and Sweet Dee started their romance in 2006, a year after the show started airing, and eventually got married in late September 2008.

Was Dee Reynolds really pregnant?

Kaitlin was pregnant during the filming of Season 6 and the writers included her pregnancy into the series. She gave birth on September 1, 2010 to Axel Lee McElhenney.