Charles Peckham Day (born February 9, 1976) is an American actor, writer, and producer. He is best known for playing Charlie Kelly on the FX dark comedy It's Always Sunny in Philadelphia (2005–present), which he stars with Rob McElhenney, Kaitlin Olson, Glenn Howerton and Danny DeVito, and he is also a writer and an executive producer. In 2011, he was nominated for a Critics' Choice Television Award and a Satellite Award for the role. He subsequently co-created the Fox sitcom The Cool Kids (2018–2019) with Paul Fruchbom and the Apple TV+ comedy Mythic Quest (2020–present) with McElhenney and Megan Ganz. He continues to executive-produce the latter. In film, Day is best known for his performances as biologist Dr Newton Geiszler in Guillermo del Toro's science-fiction monster movie Pacific Rim(2013) and its sequel Pacific Rim Uprising (2018), Dale Arbus in the comedy Horrible Bosses (2011) and sequel Horrible Bosses 2 (2014), and teacher Andy Campbell in the comedy Fist Fight(2017). He is also known for his voice roles in Monsters University (2013), The Lego Movie film franchise (2014–2019) and the Nintendo franchise character Luigi in The Super Mario Bros. Movie (2023). He made his directorial debut with Fool's Paradise in 2023. Description above from the Wikipedia article Charlie Day, licensed under CC-BY-SA, full list of contributors on Wikipedia.
TBAKill Me as Jimmy
TBAWildwood as (voice)
2026Super Mario World as Luigi (voice)
2025Honey Don't! as Marty Metakawitch
2025Summer of 69 as Rick Richards
2024Hot Ones Versus (1 Episode) as Self
2023The Saint of Second Chances as Mike Veeck
2023Fool's Paradise as Latte Pronto
2023Bupkis (1 Episode) as Glen Rossi
2023The Super Mario Bros. Movie as Luigi (voice)
2022Welcome to Wrexham (1 Episode) as Self
2022I Want You Back as Peter
2021Abbott Elementary (1 Episode) as Charlie
2021How It Ends as Lonny
2021Snacked (1 Episode) as Self
2020Mythic Quest (1 Episode) as Spencer
2019The Kelly Clarkson Show (3 Episodes) as Self
2019The Lego Movie 2: The Second Part as Benny (voice)
2018Emmet's Holiday Party: A LEGO Movie Short as Benny (voice)
2018The Cool Kids (1 Episode) as Chet the Handyman
2018Hotel Artemis as Acapulco
2018Pacific Rim: Uprising as Dr. Newton Geiszler
2018Lie Detector (1 Episode) as Self
2017I Love You, Daddy as Ralph Kinder
2017Fist Fight as Andy Campbell
2016The Hollars as Jason
2015The Late Show with Stephen Colbert (1 Episode) as Self
2015Vacation as Chad
2015Hot Ones (1 Episode) as Self
2014Horrible Bosses 2 as Dale Arbus
2014The Emmet Awards Show! as Benny (voice / uncredited / archive footage)
2014Party Central as Art (voice)
2014The Tonight Show Starring Jimmy Fallon (2 Episodes) as Self
2014The Lego Movie as Benny (voice)
2013Pacific Rim as Dr. Newton Geiszler
2013Monsters University as Art (voice)
2012Unsupervised (1 Episode) as Jesse Judge (Voice)
2011Horrible Bosses as Dale Arbus
2010Conan (2 Episodes) as Self
2010Going the Distance as Dan Grant
2009A Very Sunny Christmas as Charlie Kelly
2009The Nightman Cometh: Live as Charlie Kelly
2008A Quiet Little Marriage as Adam
2005It's Always Sunny in Philadelphia (172 Episodes) as Charlie Kelly
2005Love Thy Neighbor as Video Clerk
2005American Dad! (1 Episode) as Jon (Voice)
2003Luis (10 Episodes) as Richie
2003Reno 911! (1 Episode) as Inbred Twin
2003Jimmy Kimmel Live! (1 Episode) as Unknown
2001Late Summer as Trevor
2001Campfire Stories as Joe
2001The Red Peppers as Mr. Nudger
2000Madigan Men (1 Episode) as Unknown
2000Mary and Rhoda as Mailroom Kid
1999Third Watch (5 Episodes) as Michael Boscorelli
1997The View (1 Episode) as Self - Guest
1993Raw (1 Episode) as Unknown
1990Law & Order (1 Episode) as Jeremy
1975Saturday Night Live (1, 1 Episode) as Self - Cameo (uncredited), Self - Host
TBAKill Me ... Producer
2025Side Quest (4 Episodes) ... Executive Producer
2023For the Safety of Theo ... Executive Producer
2022I Want You Back ... Executive Producer
2020Mythic Quest (40 Episodes) ... Executive Producer
2018The Cool Kids (22 Episodes) ... Executive Producer
2017Fist Fight ... Executive Producer
2012Unsupervised (13 Episodes) ... Producer
2009A Very Sunny Christmas ... Executive Producer
2008Boldly Going Nowhere (1 Episode) ... Producer
2005It's Always Sunny in Philadelphia (172 Episodes) ... Executive Producer
2025Side Quest (4 Episodes) ... Original Series Creator
2023Fool's Paradise ... Writer
2020Mythic Quest (1 Episode) ... Writer
2018The Cool Kids (1 Episode) ... Writer
2009A Very Sunny Christmas ... Writer
2009The Nightman Cometh: Live ... Writer
2008Boldly Going Nowhere (1 Episode) ... Writer
2005It's Always Sunny in Philadelphia (58 Episodes) ... Writer
2023Fool's Paradise ... Director