The cast of "It's Always Sunny in Philadelphia."FX - Friday, September, 11, 2009, 10:11 PM

Kaitlin Olson as Sweet Dee in "It's Always Sunny in Philadelphia."FX - Friday, September, 11, 2009, 10:11 PM

Rob McElhenney as Mac in "It's Always Sunny in Philadelphia."FX - Friday, September, 11, 2009, 10:11 PM

Glenn Howerton as Dennis in "It's Always Sunny in Philadelphia."FX - Friday, September, 11, 2009, 10:11 PM

Danny DeVito as Frank in "It's Always Sunny in Philadelphia."FX - Friday, September, 11, 2009, 10:11 PM

Charlie Day as Charlie in "It's Always Sunny in Philadelphia."FX - Friday, September, 11, 2009, 10:11 PM

Glenn Howerton as Dennis, Kaitlin Olson as Sweet Dee and Danny DeVito as Frank in It's Always Sunny In Philadelphia.FX - Friday, May, 4, 2007, 6:4 PM

Charlie Day as Charlie It's Always Sunny In Philadelphia.FX - Friday, May, 4, 2007, 6:4 PM

Danny DeVito and Glenn Howerton in It's Always Sunny In Philadelphia.FX - Friday, May, 4, 2007, 6:4 PM

Rob McElhenney as Mac, Glenn Howerton as Dennis and Charlie Day as Charlie It's Always Sunny In Philadelphia.FX - Friday, May, 4, 2007, 6:4 PM

Glenn Howerton as Dennis, Rob McElhenney as Mac, Kaitlin Olson as Sweet Dee, Danny DeVito as Frank and Charlie Day as Charlie It's Always Sunny In Philadelphia.FX - Friday, May, 4, 2007, 6:4 PM

Danny DeVito FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Danny DeVito FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Charlie Day and Danny DeVito FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Danny DeVito and Charlie Day FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Danny DeVito and Charlie Day FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Danny DeVito and Charlie Day FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Danny DeVito and Charlie Day FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Danny DeVito and Charlie Day FX's It's Always Sunny in PhiladephiaWednesday, September, 20, 2006, 10:20 PM

Rob McElhenney, Glenn Howerton, Kaitlin Olson and Charlie Day FX's It's Always Sunny in PhiladephiaRobert Zuckerman - Wednesday, September, 20, 2006, 10:20 PM

Rob McElhenney FX's It's Always Sunny in PhiladephiaAaron Rapaport - Wednesday, September, 20, 2006, 10:20 PM

Rob McElhenney, Kaitlin Olson, Charlie Day and Glenn Howerton FX's It's Always Sunny in PhiladephiaAaron Rapaport - Wednesday, September, 20, 2006, 10:20 PM

Kaitlin Olson, Rob McElhenney, Glenn Howerton and Charlie Day FX's It's Always Sunny in PhiladephiaAaron Rapaport - Wednesday, September, 20, 2006, 10:20 PM

Charlie Day FX's It's Always Sunny in PhiladephiaRobert Zuckerman - Wednesday, September, 20, 2006, 10:20 PM