Charlie Day is an American actor, writer and producer best known for his leading role as Charlie Kelly on the television comedy series It's Always Sunny in Philadelphia (which he co-created, wrote and produces), since 2005.
Day's comedic talent has garnered him a loyal following amongst critics and fans the world over.
In his current role as the hapless Charlie Kelly on It's Always Sunny in Philadelphia, Day has been declared "comedy gold" by his fans. In addition to starring, he also serves as writer and executive producer. He created the series in collaboration with friends Rob McElhenney and Glenn Howerton.
Before Sunny, Day had a recurring role on NBC's Third Watch and also had a lead role as Richie in the FOX comedy Luis. His other television credits include a recurring role in ABC's Madigan Men, directed by James Burrows; Comedy Central's Reno 911!; NBC's Law & Order; and ABC's Mary and Rhoda starring Mary Tyler Moore.
Day began his acting career on stage. He played four years at the Williamstown Theatre Festival and went on to play the lead role in Dead End at the Huntington Theatre in Boston.
Day was born in Bronx, New York and grew up in Rhode Island. He currently lives in Los Angeles with his wife Mary Elizabeth Ellis, who plays Waitress in Sunny.