It's Always Sunny in Philadelphia Season 18 Filming Begins

Rob McElhenney shares a photo indicating production has started on the long-running comedy series' next season.

Published on Feb. 11, 2026

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Rob McElhenney, the co-creator and star of the hit FX/FXX comedy series It's Always Sunny in Philadelphia, has announced that filming has begun on the show's 18th season. McElhenney posted a photo of a production slate on social media, captioned "Back in the kitchen," signaling the start of production. The series, which also stars Glenn Howerton, Charlie Day, Kaitlin Olson, and Danny DeVito, was previously renewed through season 18 in 2020.

Why it matters

It's Always Sunny in Philadelphia is one of the longest-running live-action sitcoms currently on television, having just completed its 17th season. The show's continued success and renewal through season 18 demonstrates its enduring popularity and the loyalty of its fanbase, even as the core cast members like DeVito continue to age.

The details

McElhenney's social media post confirms that production on season 18 of It's Always Sunny in Philadelphia has officially begun, putting the show on track to potentially release new episodes later this year. The series was previously renewed through season 18 back in 2020, ensuring its continued run on FX/FXX. While an exact release date for season 18 has not yet been announced, the show typically films new seasons in the fall for a summer premiere, so a late 2023 or early 2024 debut seems likely.

  • In July 2022, Danny DeVito mentioned the show would begin filming again at the end of January 2023.
  • It's Always Sunny in Philadelphia season 17 premiered in July 2025.

The players

Rob McElhenney

The co-creator, executive producer, and star of It's Always Sunny in Philadelphia, playing the character of Mac.

Glenn Howerton

One of the co-creators, executive producers, and stars of It's Always Sunny in Philadelphia, playing the character of Dennis Reynolds.

Charlie Day

One of the co-creators, executive producers, and stars of It's Always Sunny in Philadelphia, playing the character of Charlie Kelly.

Kaitlin Olson

A star of It's Always Sunny in Philadelphia, playing the character of Dee Reynolds.

Danny DeVito

A longtime cast member of It's Always Sunny in Philadelphia, playing the character of Frank Reynolds.

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What they’re saying

“Back in the kitchen”

— Rob McElhenney (Instagram)

What’s next

With season 18 now in production, fans can likely expect new episodes of It's Always Sunny in Philadelphia to premiere on FX/FXX later this year or in early 2024.

The takeaway

The continued production and renewal of It's Always Sunny in Philadelphia through season 18 demonstrates the enduring popularity and cultural relevance of this long-running comedy series, even as its core cast members like Danny DeVito continue to age. The show's ability to maintain its creative spark and loyal fanbase over nearly two decades is a testament to the talents of its creators and the appeal of its dysfunctional Philadelphia-based characters.