It's Always Sunny in Philadelphia cast ages
How old were It's Always Sunny in Philadelphia actors when it started?
Charlie Day was 29, Glenn Howerton was 29, Rob McElhenney was 28 years old on 2005-08-04, the series premiere date.
These are actors’ ages on the original broadcast date, not their characters’ ages or ages during filming. This is a selected series cast comparison, not a verified list of appearances in “The Gang Gets Racist”.
Selected cast ages on 2005-08-04
| Actor | Character | Birthday | Age on air date |
|---|---|---|---|
| Charlie Day | Charlie Kelly | 1976-02-09 | 29 years |
| Glenn Howerton | Dennis Reynolds | 1976-04-13 | 29 years |
| Rob McElhenney | Ronald "Mac" McDonald | 1977-04-14 | 28 years |
| Kaitlin Olson | Deandra "Dee" Reynolds | 1975-08-18 | 29 years |
| Mary Elizabeth Ellis | The Waitress | Not confirmed | Withheld |
Season premiere dates
Choose a season in the episode picker to compare ages at a different broadcast date.
| Season | Premiere episode | Original air date / source |
|---|---|---|
| Season 1 | The Gang Gets Racist | 2005-08-04 |
| Season 2 | Charlie Gets Crippled | 2006-06-29 |
| Season 3 | The Gang Finds a Dumpster Baby | 2007-09-13 |
| Season 4 | Mac and Dennis: Manhunters | 2008-09-18 |
| Season 5 | The Gang Exploits the Mortgage Crisis | 2009-09-17 |
| Season 6 | Mac Fights Gay Marriage | 2010-09-16 |
| Season 7 | Frank's Pretty Woman | 2011-09-15 |
| Season 8 | Pop-Pop: The Final Solution | 2012-10-11 |
| Season 9 | The Gang Broke Dee | 2013-09-04 |
| Season 10 | The Gang Beats Boggs | 2015-01-14 |
| Season 11 | Chardee MacDennis 2: Electric Boogaloo | 2016-01-06 |
| Season 12 | The Gang Turns Black | 2017-01-04 |
| Season 13 | The Gang Makes Paddy's Great Again | 2018-09-05 |
| Season 14 | The Gang Gets Romantic | 2019-09-25 |
| Season 15 | 2020: A Year in Review | 2021-12-01 |
| Season 16 | The Gang Inflates | 2023-06-07 |
| Season 17 | The Gang F***s Up Abbott Elementary | 2025-07-09 |
How these ages are calculated
Subtract the actor’s birth year from the air-date year, then subtract one if their birthday had not yet occurred. Tables and the episode explorer use completed years. Missing, invalid, conflicting or unchecked birthdays do not produce an exact age. Historical broadcast ages do not imply that an actor is still living.
Premiere dates and matched birthdays were cross-checked against TVmaze’s It's Always Sunny in Philadelphia guide on 2026-10-16. Actor-name links identify birthday sources; premiere-date links identify episode sources. TVmaze data is used under CC BY-SA. A database match is not independent biographical authentication; unresolved disagreements are withheld. Episode rosters and guest credits remain under review.