Kaitlin Willow Olson McElhenney (born August 18, 1975) 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. She had minor roles in several television series before being cast as Deandra "Sweet Dee" Reynolds on the long-running FX comedy series It's Always Sunny in Philadelphia (2005–present). Olson starred as Mackenzie "Micky" Murphy in the Fox comedy series The Mick (2017–2018) and as Cricket Melfi in the Quibi comedy series Flipped (2020), which earned her a nomination for the Primetime Emmy Award for Outstanding Actress in a Short Form Comedy or Drama Series. She has also appeared in films including Leap Year (2010), The Heat (2013), Vacation (2015), Finding Dory (2016), and Arizona (2018). She has been married to actor Rob McElhenney, her co-star on It's Always Sunny in Philadelphia, since 2008.
Coyote Ugly
(Bidding Customer)
Leap Year
(Libby)
Held Up
(Rocky 2)
A Very Sunny Christmas
(Deandra "Sweet Dee" Reynolds)
Escape from Planet Earth
(3D Movie Girl (voice))
Weather Girl
(Sherry)
Champions
(Alex)
Incoming
(Ms. Nielsen)
It's a Wonderful Binge
(Mayor Spengler)
Vacation
(Arizona Cop)
Finding Dory
(Destiny (voice))
The Heat
(Tatiana)
Marine Life Interviews
(Destiny (voice))
The Nightman Cometh: Live
(Dee Reynolds)
A Tribute to Ryan Dunn
(Self)
Eyes to Heaven
Arizona
(Vicki)
Abbott Elementary x It's Always Sunny Crossover Event
(Dee Reynolds)
Family Guy
(Brenda Quagmire (voice))
Miss Match
(Jillian)
The View
(Self)
It's Always Sunny in Philadelphia
(Deandra 'Dee' Reynolds)
George Lopez
The Riches
Out of Practice
Curb Your Enthusiasm
(Cheryl's Sister)
New Girl
(Ashley)
Hacks
(DJ)
Kelsey Grammer Presents The Sketch Show
Meet the Marks
Brickleberry
(Ethel Anderson (voice))
High Potential
(Morgan)
Punk'd
(Field Agent)
The Mick
(Mackenzie 'Micky' Murphy)
The F Word
(Self)
Bob's Burgers
(Helen (voice))
Welcome to Wrexham
(Self)
Late Night with Seth Meyers
(Self)
Unsupervised
(Carol / Danielle (voice))
Unsupervised
((voice))
Unsupervised
(Carol (voice))
Unsupervised
(Danielle (voice))
Flipped
(Cricket Melfi)
The Simpsons
(Quinn Hopper (voice))
Curb Your Enthusiasm
(Becky)
Agent Elvis
(CeCe Ryder (voice))
Who Wants to Be a Millionaire
(Self - Contestant)
Space Force
(Edison Jaymes)
The Drew Carey Show
(Traylor)
Conan
(Self)
Jimmy Kimmel Live!
(Self)
College GameDay
(Herself)