It's Always Sunny in Philadelphia

Kaitlin Olson stars as "Sweet 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 in the ABC drama series High Potential from award-winning writer and producer Drew Goddard. The series is based on the French detective series HPI and centers on “Morgan” (Olson), a single mom with three kids and an exceptional mind who helps solve an unsolvable crime when she rearranges some evidence during her shift as a cleaner for the police department. Olson also serves as a producer on the series.She was most recently seen in the Emmy®-winning Max series, Hacks, opposite Jean Smart. For its sophomore season, she earned an Emmy nomination for Outstanding Guest Actress in a Comedy Series for her performance as “DJ Vance.” She recently reprised her role in the third season of Hacks and received an additional Emmy nomination for Outstanding Guest Actress in a Comedy Series for her scene-stealing performance. Olson also returned for the series’ fourth season, released on April 10, 2025.Olson is best known for her starring role on the critically acclaimed cultural phenomenon series It’s Always Sunny in Philadelphia for FXX. The sixteenth season premiered in June 2023 and has shattered the record as the longest-running live-action television sitcom in history. It’s Always 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.She was also nominated for an Emmy for Outstanding Actress in a Short Form Comedy or Drama series for her 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’ Molng,” 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, Mimi’s nemesis “Traylor” on The Drew Carey Show and “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 "Sweet Dee" on the critically-acclaimed FXX original series It’s Always Sunny in Philadelphia.

Kaitlin Olson headshot wearing a black shirt