Charlie Day appeared in a number of Theatre productions before making his debut on television with Mary and Rhoda. Thereafter, he appeared in portrayed several characters in 'Law & Order,''Madigan Men,' and 'Third Watch.'
In 2005, Charlie appeared in FX sitcom, 'It's Always Sunny in Philadelphia.' He portrayed an inherently good-natured guy and established himself as a rising talent.
He did noticeable work in films like 'A Quiet Little Marriage' and 'Going the Distance,' but the 2011 hit 'Horrible Bosses' earned him a lot of praise from critics and moviegoers. This film furthered his reputation that he had built with 'It's Always Sunny in Philadelphia.'