As “It’s Always Sunny in Philadelphia” enters its 17th season after nearly two decades, its team of writers/stars (Charlie Day, Glenn Howerton and Rob Mac) has become a well-oiled machine.

Ahead of tonight's return of FXX's It's Always Sunny in Philadelphia, Rob Mac made a very bold claim about just how good Season 17 is.

In a new video from earlier today, It's Always Sunny in Philadelphia's Rob Mac explained why he was moving forward with changing his name.

'It's Always Sunny' star Rob McElhenney filed in Los Angeles to change his name to 'Rob Mac' after it's caused confusion for years.

As “It’s Always Sunny in Philadelphia” enters its 17th season after nearly two decades, its team of writers/stars (Charlie Day, Glenn Howerton and Rob Mac) has become a well-oiled machine. They’d have ...

As “It’s Always Sunny in Philadelphia” enters its 17th season after nearly two decades, its team of writers/stars (Charlie Day, Glenn Howerton and Rob Mac) has become a well-oiled machine.

As It's Always Sunny in Philadelphia prepares to launch its 17th season, the Old City bar that was owned, in part, by series stars Rob McElhenney and Kaitlin Olson has called it quits.

Mac's Tavern bar owned by "It's Always Sunny in Philadelphia" stars will close after 15 years It's the end of an era for Mac's Tavern on Market Street in Old City.