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