<P> The thirteenth season of the American comedy television series It 's Always Sunny in Philadelphia premiered on FXX on September 5 , 2018 . </P>
<P> The thirteenth season of the American comedy television series It 's Always Sunny in Philadelphia premiered on FXX on September 5 , 2018 . </P>
when does it 's always sunny in philadelphia season 13 start
when does it 's always sunny in philadelphia season 13 start
September 5 , 2018
September 5 , 2018