
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 (2020–2025) with McElhenney and Megan Ganz.
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.
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Jeremy
Jon (Voice)
Salva-tron (voice)
Self
Charlie Kelly
Luigi (voice)
Charlie
Inbred Twin
Michael Boscorelli
Spencer
Dr. Newton Geiszler
Art (voice)
Luigi (voice)
Self
Dale Arbus
Marty Metakawitch
Benny (voice)
Benny (voice)
Dr. Newton Geiszler
Dale Arbus
Mike Veeck
Chad
Latte Pronto
Rick Richards
Acapulco
Glen Rossi
Dan Grant
Benny (voice / uncredited / archive footage)
Jason
Chet the Handyman
Jesse Judge (Voice)
Adam
Andy Campbell
Luigi (archive sound)
Self
Art (voice)
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Jimmy
Peter
Trevor
Benny (voice)
Lonny
Richie
Mailroom Kid
Ralph Kinder
Charlie Kelly
Charlie Kelly
Joe
Video Clerk
Self
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Self - Cameo (uncredited)
Self - Host
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Self - Guest
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