Release OrderRecommended
0 / 18 watchedEvery season in air order, FX through FXX.
FX
- 1 It's Always Sunny in Philadelphia Season 1 7 episodes. Premiered August 4, 2005 on FX.
- 2 It's Always Sunny in Philadelphia Season 2 10 episodes. Premiered June 29, 2006. Frank Reynolds joins the cast.
- 3 It's Always Sunny in Philadelphia Season 3 15 episodes. Premiered September 13, 2007.
- 4 It's Always Sunny in Philadelphia Season 4 13 episodes. Premiered September 18, 2008.
- 5 It's Always Sunny in Philadelphia Season 5 12 episodes. Premiered September 17, 2009.
- 6 It's Always Sunny in Philadelphia Season 6 Premiered September 16, 2010. Includes the hour-long A Very Sunny Christmas.
- 7 It's Always Sunny in Philadelphia Season 7 13 episodes. Premiered September 15, 2011.
- 8 It's Always Sunny in Philadelphia Season 8 10 episodes. Premiered October 11, 2012. Last season on FX.
FXX
- 9 It's Always Sunny in Philadelphia Season 9 10 episodes. Premiered September 4, 2013. First season on FXX.
- 10 It's Always Sunny in Philadelphia Season 10 10 episodes. Premiered January 14, 2015.
- 11 It's Always Sunny in Philadelphia Season 11 10 episodes. Premiered January 6, 2016.
- 12 It's Always Sunny in Philadelphia Season 12 10 episodes. Premiered January 4, 2017.
- 13 It's Always Sunny in Philadelphia Season 13 10 episodes. Premiered September 5, 2018.
- 14 It's Always Sunny in Philadelphia Season 14 10 episodes. Premiered September 25, 2019.
- 15 It's Always Sunny in Philadelphia Season 15 8 episodes. Premiered December 1, 2021.
- 16 It's Always Sunny in Philadelphia Season 16 8 episodes. Premiered June 7, 2023.
FXX and FX
- 17 It's Always Sunny in Philadelphia Season 17 8 episodes. Premiered July 9, 2025. Opens with the Abbott Elementary crossover.
- 18 It's Always Sunny in Philadelphia Season 18 10 episodes. Premiered August 17, 2026 on FXX and FX. Latest released entry.
Newcomer Order (Start With Season 2)
0 / 18 watchedSeason 1 was made before DeVito joined, so many fans suggest starting with season 2 and circling back.
FXX and FX
- 1 It's Always Sunny in Philadelphia Season 2 10 episodes. Premiered June 29, 2006. Frank joins from his first scene.
- 2 It's Always Sunny in Philadelphia Season 3 15 episodes. Premiered September 13, 2007.
- 3 It's Always Sunny in Philadelphia Season 4 13 episodes. Premiered September 18, 2008.
- 4 It's Always Sunny in Philadelphia Season 5 12 episodes. Premiered September 17, 2009.
- 5 It's Always Sunny in Philadelphia Season 6 Premiered September 16, 2010. Includes the hour-long A Very Sunny Christmas.
- 6 It's Always Sunny in Philadelphia Season 7 13 episodes. Premiered September 15, 2011.
- 7 It's Always Sunny in Philadelphia Season 8 10 episodes. Premiered October 11, 2012. Last season on FX.
- 8 It's Always Sunny in Philadelphia Season 9 10 episodes. Premiered September 4, 2013. First season on FXX.
- 9 It's Always Sunny in Philadelphia Season 10 10 episodes. Premiered January 14, 2015.
- 10 It's Always Sunny in Philadelphia Season 11 10 episodes. Premiered January 6, 2016.
- 11 It's Always Sunny in Philadelphia Season 12 10 episodes. Premiered January 4, 2017.
- 12 It's Always Sunny in Philadelphia Season 13 10 episodes. Premiered September 5, 2018.
- 13 It's Always Sunny in Philadelphia Season 14 10 episodes. Premiered September 25, 2019.
- 14 It's Always Sunny in Philadelphia Season 15 8 episodes. Premiered December 1, 2021.
- 15 It's Always Sunny in Philadelphia Season 16 8 episodes. Premiered June 7, 2023.
- 16 It's Always Sunny in Philadelphia Season 17 8 episodes. Premiered July 9, 2025. Opens with the Abbott Elementary crossover.
- 17 It's Always Sunny in Philadelphia Season 18 10 episodes. Premiered August 17, 2026. Latest released entry.
- 18 It's Always Sunny in Philadelphia Season 1 Circle back here. 7 episodes from 2005, made before Frank joined.
Abbott Elementary Crossover
0 / 2 watchedThe two-part story that crosses both shows. Watch the Abbott half first.
Abbott Elementary
- 1 Abbott Elementary: Volunteers Abbott Elementary season 4 episode that aired January 8, 2025 on ABC, ending on the crossover.
It's Always Sunny
- 2 The Gang F***s Up Abbott Elementary Sunny season 17 premiere, aired July 9, 2025. Concludes the story.
About It's Always Sunny in Philadelphia
Created by Rob McElhenney, the sitcom follows the owners of Paddy's Pub in South Philadelphia, airing on FX from August 4, 2005 before moving to FXX with season 9 in 2013.
Danny DeVito joined as Frank Reynolds in season 2, and the show passed 15 seasons in 2021 to become the longest-running American live-action sitcom.
Good to know
Season 18 premiered August 17, 2026 with ten episodes, and the final four air September 21, September 28, October 5, and October 12, 2026. No season 19 has been announced as of September 17, 2026, so this guide lists season 18 as the latest entry.
