How often does a scripted series hit an all-time ratings high in Season 6? Well, FX’s comedy It’s Always Sunny in Philadelphia just did it with its sixth season premiere last night. Also breaking series records was the network’s comedy The League, which opened its second season behind Sunny. At 10 PM, Sunny delivered 1.83 million adults 18-49 and 1.46 million adults 18-34, up 3% from the previous series demo highs posted by last season’s premiere. In the male demographics, the gains from the Season 5 premiere were bigger, 16% in Men 18-34 (1.01 million) and 11% in Men 18-49 (1.24 million), both all-time series highs. The total viewership, 2.21 million, was was off  by 1% in Live+same day but is expected to be a series best when Live+7 data is factored in.

Season two premiere of The League at 10:30 PM was up 76% in Adults 18-49 (1.38 million), 63% in Adults 18-34 (994,000) and 72% in total viewers (1.71 million) from its debut last year, with series highs across the board. It retained 77% of the Sunny in Philadelphia’s lead-in in total viewers and 76% in 18-49.

That’s certainly great news for FX, which also is enjoying ratings success with Sons of Anarchy but its new PI drama Terriers has been a ratings disappointment. After its low-rated premiere last week that drew a 0.5 rating in 18-49, Episode 2 on Wednesday fell even further to 0.4.