About

Charles Peckham “Charlie” Day (born February 9, 1976) is an American actor and writer best known for playing Charlie Kelly on It’s Always Sunny in Philadelphia, as well as for his roles in the films Horrible Bosses (2011) and Pacific Rim (2013).

Early life
Day was born in New York City, New York. His mother, Mary (née Peckham), is a piano teacher at The Pennfield School in Portsmouth, Rhode Island. His father, Dr. Thomas Charles Day, is a professor of Music History and Music Theory at Salve Regina University in Newport, Rhode Island. Day spent most of his childhood in Middletown, Rhode Island. He attended Pennfield School and graduated from Portsmouth Abbey School, both in Portsmouth, Rhode Island. He went on to attend Merrimack College in North Andover, Massachusetts where he was a shortstop on the baseball team.

Career
Besides playing Charlie Kelly on the hit FX television series It’s Always Sunny in Philadelphia, he is also the show’s executive producer and one of its writers. He has also appeared on several other television shows such as Third Watch, Law & Order, and Reno 911!. He appeared in New Line Cinema’s Horrible Bosses in July 2011, opposite Jason Bateman, Jason Sudeikis, Kevin Spacey, Jennifer Aniston, Colin Farrell, and Jamie Foxx. He also had a role in the 2010 film Going the Distance, alongside Justin Long, Jason Sudeikis, and Drew Barrymore. In 2013, he voiced a character named Art in the Pixar animated film Monsters University and appeared in Guillermo del Toro’s film Pacific Rim. Day hosted the November 5, 2011 episode of Saturday Night Live (SNL) with Maroon 5 as the musical guest. He was the second cast member from It’s Always Sunny in Philadelphia to host SNL (after Danny DeVito, though DeVito hosted SNL before It’s Always Sunny in Philadelphia premiered). DeVito made a special appearance during Day’s opening monologue.

(From Wiki)