The Gang is back for an eighteenth round. FX Networks released the Season 18 trailer for It's Always Sunny in Philadelphia on 29 July 2026, with new episodes premiering 17 August on FXX and Hulu (Deadline). The season runs 10 episodes.

Season 17 ended with Frank Reynolds, played by Danny DeVito, planning to marry Samantha — a woman he met on a Golden Bachelor-style dating show, played by Carol Kane. The Season 18 trailer picks up the wedding storyline and takes a dark turn: Samantha appears to slip into what the trailer frames as a "Weekend at Bernie's" state before the ceremony, teasing a possible character death (Deadline). For anyone unfamiliar with the reference, Weekend at Bernie's is a 1989 comedy about two men propping up a corpse to pretend their boss is still alive.

Before the wedding chaos, Dee — played by Kaitlin Olson — gives Samantha a crash course on what marriage to Frank actually entails. It is the kind of advice that arrives too late to be useful.

The trailer, which runs 1 minute and 16 seconds on FX Networks' website and is available in 4K on YouTube, also shows the Gang dressed in Renaissance Faire attire (FX Networks, YouTube). That costume choice ties into one of the season's plotlines: battling the McPoyle clan at a Renaissance Faire.

Season 18's storylines pull from a familiar mix of the absurd and the topical. The Gang tries to salvage inheritances from a dead woman, navigates tent encampments, faces job loss from workplace automation, and sponsors a Little League team as a form of sportswashing — the practice of using sports to improve a tarnished reputation (Deadline).

A deep bench of returning supporting characters fills out the season: The Waitress, Gail the Snail, Uncle Jack, the McPoyles, Artemis Dubois, Cricket, and one of Frank's favourite sex workers (Deadline). Each has been a recurring presence across the show's two-decade run.

Rob McElhenney created the series and returns as an executive producer alongside Charlie Day, Glenn Howerton, and others. All three also star.

For fans, the appeal is straightforward: eight seasons past the point where most comedies run out of steam, Sunny is still stacking new storylines on old characters and letting the mess pile up. A wedding that may involve a corpse is very much on brand.