It's Always Sunny in Philadelphia

Kaitlin Olson stars as "Dee" on the critically-acclaimed FXX original series It’s Always Sunny in Philadelphia.

Career Highlights

Kaitlin Olson continues to make a remarkable impact across television and the big screen.Olson can currently be seen starring in the acclaimed ABC drama series “High Potential,” for which she also serves as executive producer. From award-winning creator Drew Goddard, the series follows Morgan (Olson), a single mom with an exceptional mind whose unconventional knack for solving crimes leads to an unusual and unstoppable partnership with a by-the-book, seasoned detective. The series debuted its second season in September 2025, serving as the fall’s No. 1 entertainment series in broadcast primetime among total viewers in live+7-day viewing, continuing to shatter ratings records for yet another consecutive season. The show has been renewed for a third season.She was most recently seen in the Emmy-winning HBO Max series “Hacks” opposite Jean Smart and Hannah Einbinder. For its second and third season, she earned back-to-back Emmy nominations for outstanding Guest Actress in a Comedy Series for her performance as DJ. The fifth and final season of “Hacks” is airing on HBO Max, where Olson returns as her fan-favorite character one last time.Olson is best known for her starring role on the critically acclaimed cultural phenomenon series “It’s Always Sunny in Philadelphia” for FXX. Shattering the record as the longest-running live-action television sitcom in history, “Sunny” has been positioned as a cultural juggernaut on a global scale for its unapologetic satirizing of human nature – consistently delivering record-breaking ratings year after year. Recently, The Gang can be seen in the “Abbott Elementary” and “It’s Always Sunny in Philadelphia” crossover event, which debuted its first part in the fourth season of “Abbott Elementary” in January 2025 and the second part in the 17th season of “Sunny” in July 2025.She was also nominated for an Emmy for Outstanding Actress in a Short Form Comedy or Drama series for her role in “Flipped,” a Quibi series in which she and Will Forte play a clueless, narcissistic couple trying to launch their own house-flipping show. Prior to that, she starred in and executive produced “The Mick,” where she plays Mackenzie “Mickey” Murphy, a hard-living aunt forced to take care of her wealthy sister’s spoiled kids after the mom flees the country to avoid criminal charges. The Hollywood Reporter called the show “an opportunity to put Olson and the things she does best front and center."Olson has been praised for crafting unique and memorable characters that recur on several shows including Larry David’s sister-in-law Becky on “Curb Your Enthusiasm,” one-armed neighbor Hartley Underwood on FX’s “The Riches,” as well as Mimi’s nemesis Traylor on “The Drew Carey Show” and as Ashley on “New Girl.”On the feature front, she was recently seen in Bobby Farrelly's “Champions,” an English-language adaptation of the Spanish film of the same name, which tells the story of a minor league basketball coach who is forced to do community service and decides to help coach a Special Olympics team. She stars alongside Woody Harrelson. Focus Features released the film domestically in March 2023.Olson’s film credits include the Chernin Brothers’ “Incoming” for Netflix, Pixar’s “Finding Dory,” the hit FOX comedy “The Heat,” “Arizona” and Universal’s romantic comedy “Leap Year,” in which she appeared opposite Amy Adams.She currently resides in Los Angeles.

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Kaitlin Olson stars as "Dee" on the critically-acclaimed FXX original series It’s Always Sunny in Philadelphia.

Kaitlin Olson headshot wearing black tshirt and gold earrings.

Kaitlin Olson as Dee | Always Sunny on FXX

It's Always Sunny in Philadelphia

Kaitlin Olson

Career Highlights

Danny DeVito
as Frank

David Hornsby
as Rickety Cricket / Executive Producer / Writer

Mary Elizabeth Ellis
as The Waitress

Kaitlin Olson as Dee | Always Sunny on FXX

Kaitlin Olson

David Hornsbyas Rickety Cricket / Executive Producer / Writer

Mary Elizabeth Ellisas The Waitress

David Hornsby
as Rickety Cricket / Executive Producer / Writer

Mary Elizabeth Ellis
as The Waitress