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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as Marty Metakawitch
Executive Producer
Original Series Creator
as Rick Richards
as Robutler (voice)
as Self
Executive Producer
as Mike Veeck
as Latte Pronto
Director
Writer
as Glen Rossi
as Luigi (voice)
as Self
as Peter
Executive Producer
as Charlie
as Lonny
as Self
as Spencer