'It's Always Sunny in Philadelphia' Renewed for Four More Seasons at FX Byron Cohen/FX Picked up through season 18, the series tops 'Ozzie and Harriet' as the longest-running live-action scripted comedy in TV history. It's Always Sunny in Philadelphia has made TV history. FX on Thursday announced that it has renewed the scripted comedy for four additional seasons. That takes the series through its 18th season and officially snaps Ozzie and Harriet's record as the longest-running live-action scripted comedy in TV history. (The ABC comedy ran for 14 seasons.) FX CEO John Landgraf made the announcement as part of Disney's investor day presentation. The news comes as both Landgraf and producers have been open about keeping