
Acting
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…

The Super Mario Galaxy Movie
as Luigi (voice)

Wildwood
as (voice)

Kill Me
as Jimmy

Honey Don't!
as Marty Metakawitch

Summer of 69
as Rick Richards
PaleyLive: It’s Always Sunny in Philadelphia 20th Anniversary Celebration!
as Self

The Super Mario Bros. Movie
as Luigi (voice)

Fool's Paradise
as Latte Pronto

The Saint of Second Chances
as Mike Veeck

I Want You Back
as Peter

Hot Ones Versus
as Self · 1 ep.

Bupkis
as Glen Rossi · 1 ep.

Welcome to Wrexham
as Self · 1 ep.

Abbott Elementary
as Charlie · 1 ep.

Snacked
as Self · 1 ep.

Mythic Quest
as Spencer · 1 ep.

The Kelly Clarkson Show
as Self - Guest · 3 ep.

The Cool Kids
as Chet the Handyman · 1 ep.

The Late Show with Stephen Colbert
as Self · 1 ep.

Hot Ones
as Self · 1 ep.
It's Always Sunny in Philadelphia
2005