Charlie Day is an American television and film actor from Middletown Rhode Island best known for playing Charlie Kelly on Its Always Sunny in Philadelphia Besides playing Charlie Kelly on the hit FX television series Its Always Sunny in Philadelphia he is also the shows 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 Cinemas 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 Toros 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 Its Always Sunny in Philadelphia to host SNL after Danny DeVito though DeVito hosted SNL before Its Always Sunny in Philadelphia premiered DeVito made a special appearance during Days opening monologue