Charles Peckham Day, known as Charlie Day, is an American actor, comedian, and producer born on February 9, 1976. He rose to fame for his role as Charlie Kelly on the popular TV show "It's Always Sunny in Philadelphia," which he also co-created and produced. Day has also appeared in films such as "Horrible Bosses," "Pacific Rim," and "The Lego Movie." He is praised for his comedic timing and quirky characters, making him a beloved figure in the comedy world. Off-screen, Day is known for his philanthropy work and dedication to various charitable causes.