Posted in: FX, TV | Tagged: always sunny, It's Always Sunny In Philadelphia

It's Always Sunny in Philadelphia S18: Explosive Look at Danny DeVito

Rob Mac shared a look at Danny DeVito (with a guest appearance from Charlie Day) from filming on It's Always Sunny in Philadelphia Season 18.

With cameras rolling on the 18th season of FXX's Rob Mac, Charlie Day, Glenn Howerton, Kaitlin Olson, and Danny DeVito-starring It's Always Sunny in Philadelphia, we've been stalking social media for any and all updates that could be coming our way. For example, Mac shared a look at DeVito and Day wearing what seem to be maintenance men's outfits, with a scene from Die Hard in the background (at least, that's how we see it). Do we know what any of that could mean? Nope, but it's still pretty fascinating…

Here's a look at Mac's post, followed by a look back at previous Season 18 updates from the cast leading up to the start:

It's Always Sunny in Philadelphia Season 18: Previous Updates

In July 2025, DeVito offered a huge production update on the 18th season, sharing with Collider that, "We start at the end of January." The actor continued, "We're going to go again next season. We just talked about when we're going to start. And it's something that you look forward to because it really is so much fun. I love these guys and Kaitlin [Olson] and Mary Elizabeth [Ellis] and Artemis [Pebdani], and everybody that's on the show. And Lynne [Marie Stewart], we miss." DeVito was referring to the late Lynne Marie Stewart, who portrayed Charlie's mother, Bonnie Kelly, and passed away earlier that year.

Via Charitybuzz in September 2025, Olson offered fans a chance to bid on a visit to the "Always Sunny" set and a meet-and-greet with Olson (with all proceeds benefitting Emily's Entourage). The description of the visit noted: "This unforgettable experience is currently scheduled to take place in Los Angeles on the Fox lot during the last two weeks of February (exact date may change based on the filming schedule, but we will do our best to accommodate date requests)." Under the section "Dates," it noted "Experience will occur within the following date range(s): Feb 12, 2026 to Feb 28, 2026" (while adding, "Experience blackout dates: Dates are subject to change due to flexibility in the filming schedule").

Checking in last month with Chelsea Handler during Handler's podcast, Dear Chelsea…, Olson discussed "Always Sunny" and knowing when it's time to step away and close the doors to Paddy's. "It's getting weird. Like… a few years ago, it was exciting. We're like, 'Oh, we're breaking records.' And now it's like, 'Well, now we're just old and weird," Olson shared near the opening of the show, after Handler noted that being on a show for 17 seasons was "crazy" and "like two lifetimes of television." As she has said repeatedly over the year, Olson reaffirmed what the show has meant to her on both a personal and professional level. "I have zero mixed feelings about it ["Always Sunny"]. I met my husband. I've got two kids. It's the best thing that ever happened to me," Olson added. "But also, you don't want to overstay your welcome. You know what I mean? So, at what point am I like, 'I should probably Irish exit. Should I just leave the show and not tell anyone?'"

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