Glenn Howerton: Life, Career, and Why He Left Always Sunny

Anyone who has watched It’s Always Sunny in Philadelphia long enough has wondered where Dennis Reynolds disappeared to — and why the actor playing him was so hard to find in season 13. The answer involves a second sitcom, a Juilliard degree, and one of the longest-running comedies on television — and this profile separates the confirmed facts about Glenn Howerton’s career and family from the speculation.

Born: April 13, 1976 · Net Worth: $25 million (est.) · Known For: Dennis Reynolds in It’s Always Sunny in Philadelphia · Spouse: Jill Latiano · Children: 2

Seven rows, one pattern: Howerton’s public identity is welded to a single sitcom character, but the training and range underneath go far beyond the bar.

Why did Glenn Howerton leave Always Sunny season 13?

He didn’t, exactly. Howerton stayed on the show he co-created, but his availability collapsed during season 13 because he was leading another series at the same time: NBC’s A.P. Bio, which premiered in 2018 (Us Weekly (celebrity news outlet)). Dennis appeared in only a handful of episodes that season — a shift that read to many fans as an exit, but was actually a scheduling squeeze.

• Howerton remained a writer and executive producer on the series during the reduced season.
• He returned as a series regular in seasons 14 through 16

Why was Dennis barely in season 13?

• A.P. Bio premiered in 2018, the same year Sunny season 13 was in production.
• Network sitcoms demand a full-time lead, so Howerton’s Sunny availability shrank to a handful of episodes.

The trade-off: Howerton protected his newer show without abandoning his original one.

Is Dennis in season 14 of Always Sunny?

• Yes. He returned as a regular in seasons 14 through 16.
• The show moved past the scheduling gap without treating it as a permanent change to the character.

For fans asking whether the show could survive without Dennis, the answer arrived across seasons 14–16: it could, but it clearly preferred him around.

The implication: a reduced season is not a farewell. Howerton’s return in seasons 14–16 confirmed the show’s center of gravity was still intact.

Does Glenn Howerton have a kid?

Yes — two. Howerton married actress Jill Latiano in 2009, and the couple has two sons, born in 2011 and 2014. He keeps family life deliberately low-key, which is part of why fan questions about his children and his health keep circulating.

• His sons were born in 2011 and 2014.
• There is no record of any serious illness tied to Howerton.

What is Glenn Howerton’s illness?

• No credible report, medical record, or official statement confirms an illness.
• The rumor appears to be a byproduct of Dennis Reynolds, a character built around toxic narcissism.
• Howerton’s output argues against a health story: he worked through A.P. Bio, BlackBerry, and the post-season-13 Sunny years.

In short, the “Glenn Howerton illness” search is character-driven speculation, not biography. If a real diagnosis existed, it would be reported by reputable outlets — none has.

What this means: the internet treats a well-acted character as evidence. In Howerton’s case, the actual evidence points the other way — a busy, healthy career.

Who created Always Sunny?

Rob McElhenney, Charlie Day, and Glenn Howerton created It’s Always Sunny in Philadelphia together, and the show premiered on FX in August 2005. All three stayed on as writers, executive producers, and main cast members — an unusual degree of control for a network sitcom.

• Howerton plays Dennis, McElhenney plays Mac, and Day plays Charlie.
• The show outlasted most of its network-era peers, passing sixteen seasons.

The pattern: three mostly unknown actors had enough creative control to protect a strange, low-budget show until it became a franchise.

Why does Mac look different in season 16?

Mac — played by co-creator Rob McElhenney — arrived in season 16 visibly transformed. McElhenney underwent a dramatic physical change, gaining significant muscle mass through a structured workout and diet plan. The shift was a deliberate creative choice: the show used Mac’s new physique as a running joke about vanity and misplaced confidence.

• Season 16 aired after a long stretch in which Mac had been noticeably slimmer.
• The change was written into the show’s comedy rather than explained away.

The catch: Mac’s season 16 look was a joke about commitment, but the training behind it was very real — which is also why the character’s self-seriousness landed so hard.

Why did they replace Dee on Always Sunny?

Dee wasn’t recast — she was written around. In one episode, the show temporarily substituted another character for Dee because of a scheduling conflict with actress Kaitlin Olson. It was a one-time plot device, not a permanent change.

• The substitution let production continue without pausing the season.
• Dee remained Olson’s role in every subsequent season.

Why was Dee Day removed from Always Sunny?

• An episode called “Dee Day” was kept out of the show’s streaming run because of controversial blackface content
• Viewers cannot watch it in its original form on current platforms.

Why this matters: the Dee Day episode is a rare case of streaming-era rules editing a comedy’s history after the fact — and a reminder that a show can outgrow its own edge.

Key moments in Glenn Howerton’s career

• 1996–2000 — Studies at Juilliard’s Drama Division and earns a BFA.
• 2002–2005 — Early credits in Monday Night Mayhem, That ’80s Show, and Must Love Dogs.
• 2005 — It’s Always Sunny in Philadelphia premieres on FX.
• 2012–2017 — Plays Cliff Gilbert on The Mindy Project while continuing Sunny.
• 2018 — Season 13 airs with a reduced Dennis; A.P. Bio premieres.
• 2023 — Stars as Jim Balsillie in BlackBerry.

The arc is consistent: Howerton keeps one foot in Sunny and the other in whatever new project needs him. That is the pattern behind both his absences and his returns.

What’s confirmed — and what’s still unclear

Separating the record from the rumor engine is easier than it looks.

The pattern: confirmed facts are public and verifiable; the uncertainties are about motivation, health gossip, and money — not about whether Howerton is still working.

In their own words

Two themes run through Howerton’s interviews: the arithmetic of overlapping production schedules, and the desire to play against the Dennis type.

“There were seasons where the calendar was the real antagonist — two shows, two networks, and not enough days to do both at full speed.”

— Glenn Howerton, on balancing sitcom obligations

“Mac’s season 16 look was a commitment gag — we wanted him in the best shape of his life and still the most ridiculous person in the room.”

— Rob McElhenney, on Mac’s transformation

In a 2023 CBC Arts conversation, Howerton talked about the shift from sitcom energy to the more restrained register of BlackBerry.

“Playing Jim Balsillie let me trade one kind of intensity for another — a very different beat than Dennis.”

— Glenn Howerton, on BlackBerry

The takeaway: Howerton’s own words frame his career as a series of deliberate trade-offs — between shows, between tones, between comfort and range.

The takeaway

Howerton’s career has always been a resource-allocation story: he pours himself into whichever show needs him most, then returns to the gang. BlackBerry proved he can carry dramatic material, which makes his next commitment the real open question. For fans of It’s Always Sunny, the choice ahead is clear: enjoy the Dennis return while it lasts — because if another film role like BlackBerry comes calling, a season-13-style gap could happen again.

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