It's Always Sunny in Philadelphia

Charlie Day stars as "Charlie" in the critically-acclaimed FXX original series It’s Always Sunny in Philadelphia. He also serves as executive producer and writer of the show.

Career Highlights

Charlie Day’s talent as an actor, producer and director in both film and television has garnered him a loyal following among critics and fans all over the world.Most recently, Day returned as the voice of Luigi in Illumination's second installment of the Super Mario Bros. movie franchise, “The Super Mario Galaxy Movie.” In this sequel to 2023’s global hit, “The Super Mario Bros. Movie,” Day once again stars alongside Chris Pratt, Jack Black and Anya Taylor-Joy. The film hit theaters on April 1, 2026, and is currently the highest grossing film of 2026.In March 2026, Day co-produced and starred in the hit murder-mystery “Kill Me,” alongside Allison Williams and Giancarlo Esposito. The film follows a man who wakes up convinced he survived a murder attempt and sets out to uncover the truth. The film premiered at the SXSW Film Festival on March 12, 2026, with Day receiving rave reviews for his performance including Variety noting that “the role allows for Day to show his range and he runs with it” and Screen Rant claiming this as “one of his best performances yet.” The film is currently at 100% on Rotten Tomatoes and has also achieved Certified Fresh status.In Fall 2025, Day was seen starring in Focus Features’ comedy crime film “Honey Don’t” opposite Margaret Qualley, Aubrey Plaza and Chris Evans. Directed by Ethan Coen, the film follows a small-town private investigator (Qualley) who delves into a series of mysterious deaths tied to a local church and its charismatic but corrupt leader (Evans). “Honey Don’t” premiered at the 78th Cannes Film Festival and was later released in theatres in August 2025.In May 2023, Day made his feature film directorial debut with the satirical comedy “Fool’s Paradise,” which he also wrote and starred in. The film features an ensemble cast that includes Ken Jeong, the late Ray Liotta, Kate Beckinsale, Adrien Brody, Common, Jason Sudeikis, Edie Falco and John Malkovich.On the small screen, Day became a household name for his role as the hapless Charlie Kelly on FX’s “It’s Always Sunny in Philadelphia,” for which he also writes and executive produces. He created the show in collaboration with friends and co-producers Rob Mac and Glenn Howerton. “It’s Always Sunny in Philadelphia” is TV’s longest running live-action sitcom. With Rob Mac and Megan Ganz, he also created the Apple TV series “Mythic Quest: Raven’s Banquet.”Before “It’s Always Sunny in Philadelphia,” Day had a recurring role on NBC’s “Third Watch” and also appeared on the FOX comedy, “Luis.” Other television credits include “Drunk History,” “Law &amp; Order SVU,” “American Dad,” “Reno 911,” “Mary and Rhoda,” “Madigan Men,” “Campfire Stories” and “Unsupervised.”In film, Day is best known for his roles in “Going the Distance,” Horrible Bosses,” “I Want You Back,” “Monsters University,” “Pacific Rim,” “The Lego Movie,” “Horrible Bosses 2,” “Vacation,” “The Hollars,” "Fist Fight,” “Pacific Rim: Uprising,” “I Love You, Daddy,” “The Lego Movie 2” and “Hotel Artemis.”

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Charlie Day stars as "Charlie" in the critically-acclaimed FXX original series It’s Always Sunny in Philadelphia. He also serves as executive producer and writer of the show.

Charlie Day headshot wearing a red shirt and green jacket.

Charlie Day as Charlie Kelly | Always Sunny on FXX

It's Always Sunny in Philadelphia

Charlie Day

Career Highlights

Glenn Howerton
as Dennis / Executive Producer / Writer

Kaitlin Olson
as Dee

Danny DeVito
as Frank

Charlie Day as Charlie Kelly | Always Sunny on FXX

Charlie Day

Kaitlin Olsonas Dee

Danny DeVitoas Frank

Kaitlin Olson
as Dee

Danny DeVito
as Frank