The gang is the core five cast of It's Always Sunny in Philadelphia, and here is how old each of them is as of season 16. Dennis, Dee, Frank, Mac, and Charlie have become some of the most iconic sitcom characters of all time throughout It's Always Sunny in Philadelphia's 18-year run, with all five characters remaining on the show as of the writing of this article. The cast of It's Always Sunny in Philadelphia has grown up with the show, with each member's life and career growing throughout its run, leading many viewers to wonder how old each character actually is.
It's Always Sunny in Philadelphia season 16 is out now, with it bringing back the gang for some more hilarious antics. The series follows the owners of Paddy's Pub, a small bar in Philadelphia, as their horrible attitudes and personalities get them into all sorts of zany situations. Season 16 kicked off with two episodes, the first of which tackles US inflation and the rent crisis, and the second of which focuses on Dennis, Dee, Mac, and Charlie's relationships with their parents. It's Always Sunny in Philadelphia season 16 has already delved into the gang's families more than previous seasons, giving a better idea of how old each character is.
Dennis Reynolds Is 47 Years Old
Dennis Reynolds is the most unhinged member of the gang, frequently going on rage-filled rants about various topics. Although the show hasn't exactly confirmed Dennis Reynolds' date of birth, it can be presumed that Dennis is around 47 years old in It's Always Sunny in Philadelphia season 16. Throughout the show, Frank mentions that Dennis was born in the mid-70s, although he doesn't specify what year. Since It's Always Sunny in Philadelphia takes place in 2023, the mid-70s would have been around 49 to 47 years ago. Although that is a rough estimate, there is evidence to suggest that Dennis is exactly 47.
The characters in It's Always Sunny in Philadelphia have aged alongside their actors, meaning that Dennis is most likely the same age as the actor who plays him: Glenn Howerton. Glenn Howerton was born on April 13, 1976, making him 47 years old as of the writing of this article. Since Frank has said that Dennis was born in the 1970s, it seems likely that It's Always Sunny in Philadelphia is just basing Dennis' age on that of Glenn Howerton. Because of this, it seems most likely that Dennis Reynolds is 47 years old in It's Always Sunny in Philadelphia.
Dee Reynolds Is 47 Years Old
Dee Reynolds is the only female member of the gang, with this making her the subject of constant jokes by her male friends and co-workers. Similarly to Dennis, Dee's age has never been confirmed either. However, since she is the twin sister of Dennis, it only makes sense for her to also be the same age as him. Frank's comments on Dee and Dennis' birth make it clear that 47 is roughly their age, give or take a few years. Interestingly, Dee is slightly older than Dennis, with her never failing to bring up that she was born three minutes before her twin brother.
Similar to Dennis, it is safe to assume that Dee has also aged alongside her actress, Kaitlin Olson. Kaitlin Olson was born on August 18, 1975, making her 47 as of the writing of this article. This puts the performers playing Dee and Dennis at the exact same age, further ing the characters being twins as well as them being 47 years old. So, as of It's Always Sunny in Philadelphia season 16, the series makes it pretty clear that Dee and Dennis Reynolds are both 47 years old.
Frank Reynolds Is 79 Years Old
Out of all the of the gang, Frank Reynolds' age is the easiest to pinpoint. Frank Reynolds is the gang's financial backing, with him constantly providing money to fund the gang's antics. Frank is also Dennis and Dee's biological father, with his comments giving most of the hints as to their age. As it turns out, Frank Reynolds' license is shown in It's Always Sunny in Philadelphia season 13, episode 5, "The Gang Gets New Wheels." Frank's license lists his birthday as July 31, 1943, clearly making the character 79 as of the writing of this article.
Interestingly, Frank Reynolds' age actually contradicts that of his real-life actor, Danny DeVito. Danny DeVito was born on November 17, 1944, meaning that the actor is 78 as of the writing of this article. This causes Frank Reynolds to be over one year older than Danny DeVito. It isn't known why the show's character has a different age from his real-life counterpart, but it's good to have a confirmed birthday for at least one member of the gang.
Mac Is 46 Years Old
Similarly to Frank, Mac McDonald also has a fairly concrete age, as he is one of the few characters in It's Always Sunny in Philadelphia that has a confirmed birth year. As is revealed in It's Always Sunny in Philadelphia season 1, episode 3, "Underage Drinking: A National Concern," Mac was born sometime in 1977. This makes Mac somewhere around 46 years old, which is the same age as his actor, Rob McElhenney. This would make Mac one year younger than Dennis and Dee, causing him to actually be the youngest member of the gang, although not by much.
Charlie Kelly Is 47 Years Old
Much like Dee and Dennis, Charlie Kelly is also most likely 47 years old. Up until Charlie's dad Shelley Kelly was introduced in It's Always Sunny in Philadelphia season 15, Charlie believed that Frank Reynolds was his biological father. This was due to Charlie discovering that Frank slept with Charlie's mother Bonnie Kelly in 1976, which lined up with his birth. This means that Charlie Kelly was either born in late 1976 or early 1977, pinning his age at around 47 years old.
Charlie being 47 also lines up with his actor's age. Charlie Day was born on February 9, 1976, with him being 46 years old as of the writing of this article. This follows the previously established pattern of characters being roughly the same age as their respective actors, rounding out the mystery of every character's age in It's Always Sunny in Philadelphia season 16.
New episodes of It's Always Sunny in Philadelphia air Wednesdays on FXX.