‘It’s Always Sunny in Philadelphia’ Season 18 Begins Filming: Everything We Know

Glenn Howerton, Charlie Day, and Rob McElhenney for 'It's Always Sunny in Philadelphia' Season 18
Rob Mac via Instagram

It’s Always Sunny in Philadelphia‘s 17th season may have aired in 2025, but the FXX comedy is already back to work as the gang in charge of Paddy’s Pub returns for Season 18 filming.

While no premiere date is currently set, the latest production update is sure to excite the die-hard fans of this long-running comedy, and the cast is already teasing some fun breadcrumbs of what’s to come for It’s Always Sunny in Philadelphia Season 18. From filming details to the latest teases shared from behind the scenes, we’re breaking down everything you need to know about the show’s return so far. And keep an eye out in the months ahead as the latest chapter of the Always Sunny takes shape.

Has It’s Always Sunny in Philadelphia been renewed for Season 18?

Yes, as mentioned above, Season 18 of It’s Always Sunny in Philadelphia is already confirmed after the show was renewed for Season 18. Announced 5 years ago in 2020, FXX renewed the show through Season 18 in December of that year, but if the show is to continue beyond the upcoming chapter, FXX will have to announce additional seasons.

When will It’s Always Sunny in Philadelphia Season 18 premiere?

Carol Kane and Danny DeVito in 'It's Always Sunny in Philadelphia'

Patrick McElhenney / FX

No premiere date for It’s Always Sunny in Philadelphia Season 18 has been announced yet, but during an appearance on the Where Everybody Knows Your Name podcast hosted by Ted Danson, Charlie Day teased that the writers’ room for Season 18 would open in October 2025. It has since been shared by the stars on social media that the show is back to filming as of February 2026. “Back in the kitchen,” an image of a Season 18 clapperboard was captioned.

 

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Who will star in It’s Always Sunny in Philadelphia Season 18?

Currently, we anticipate the return of Day as Charlie, Rob McElhenney as Mac, Glenn Howerton as Dennis, Kaitlin Olson as Dee, and Danny DeVito as Frank, although no official announcements have been made. As with most seasons of the show, we’d also expect a few more familiar faces to return in recurring roles. One looming question is whether Carol Kane will make a comeback as Sam, the woman Frank chose as his romantic partner after appearing on The Golden Bachelor in Season 17’s finale. Only time will tell, but we’ll keep you updated as soon as there’s news.

Is there a trailer for It’s Always Sunny in Philadelphia Season 18?

No, there isn’t any trailer for It’s Always Sunny in Philadelphia Season 18 yet, but McElhenney shared a fun side-by-side image of himself, Howerton, and Day dressed in tuxes, mimicking a scene from Season 1. See the sweet reference here:

 

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What is It’s Always Sunny in Philadelphia Season 18 about?

No official loglines for Season 18 of It’s Always Sunny in Philadelphia have been released so far, but we’re sure it will follow the exploits of the  Paddy’s Pub gang as always.

Stay tuned for updates, and let us know what you hope to see when It’s Always Sunny in Philadelphia returns to TV with Season 18 in the comments section below.

It’s Always Sunny in Philadelphia, Season 18 Premiere, TBA, FXX