Charlie Day
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/FXX dark comedy It's Always Sunny in Philadelphia (2005–present), of which 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. Subsequently, he co-created the Apple TV+ comedy Mythic Quest (2020–2025) with Rob Mac and Megan Ganz.
In film, Day is best known for his performances as Dr. Newton Geiszler in Guillermo del Toro's Pacific Rim (2013), Dale Arbus in the comedy Horrible Bosses (2011) and its sequel Horrible Bosses 2 (2014), and 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 Nintendo franchise character Luigi in The Super Mario Bros. Movie (2023) and its sequel, The Super Mario Galaxy Movie (2026). He made his directorial debut with Fool's Paradise (2023).
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Acting
Movie
Pacific Rim
as Dr. Newton Geiszler
2013
Movie
Monsters University
as Art (voice)
2013
TV
Rick and Morty
as Salva-tron (voice)
2013
Movie
The Super Mario Bros. Movie
as Luigi (voice)
2023
Movie
The Lego Movie
as Benny (voice)
2014
Movie
Horrible Bosses
as Dale Arbus
2011
Movie
Pacific Rim: Uprising
as Dr. Newton Geiszler
2018
Movie
Horrible Bosses 2
as Dale Arbus
2014
Movie
Vacation
as Chad
2015
Movie
The Lego Movie 2: The Second Part
as Benny (voice)
2019
TV
American Dad!
as Jon (Voice)
2005
Movie
The Super Mario Galaxy Movie
as Luigi (voice)
2026
Movie
Hotel Artemis
as Acapulco
2018
TV
It's Always Sunny in Philadelphia
as Charlie Kelly
2005
Movie
Fist Fight
as Andy Campbell
2017
Movie
Going the Distance
as Dan Grant
2010
TV
Law & Order
as Jeremy
1990
TV
Saturday Night Live
as Self - Cameo (uncredited)
1975
TV
Saturday Night Live
as Self - Host
1975
TV
Mythic Quest
as Spencer
2020
Movie
Honey Don't!
as Marty Metakawitch
2025
TV
The Tonight Show Starring Jimmy Fallon
as Self
2014
TV
The Tonight Show Starring Jimmy Fallon
as Self - Guest
2014
Movie
I Want You Back
as Peter
2022
Crew
TV
It's Always Sunny in Philadelphia
Writer
2005
Movie
Fist Fight
Executive Producer
2017
TV
Mythic Quest
Writer
2020
Movie
I Want You Back
Executive Producer
2022
Movie
Fool's Paradise
Director
2023
TV
Side Quest
Executive Producer
2025
TV
The Cool Kids
Executive Producer
2018
TV
Unsupervised
Producer
2012
Movie
A Very Sunny Christmas
Writer
2009
Movie
The Nightman Cometh: Live
Writer
2009
TV
Boldly Going Nowhere
Writer
2008
Movie
Kill Me
Producer
2026