It's Always Sunny in Philadelphia (IASIP) is an American sitcom created by Rob McElhenney and co-developed by Glenn Howerton for FX, currently airing on FXX and FX. The show premiered on August 4, 2005, and stars Charlie Day, Howerton, McElhenney, Kaitlin Olson, and Danny DeVito, with Day, Howerton, and McElhenney as executive producers.
The series, influenced by earlier sitcoms like The Office (UK), Seinfeld and Curb Your Enthusiasm, follows the exploits of a group of narcissistic, sociopathic friends who run an Irish dive bar in South Philadelphia, but spend most of their free time drinking, scheming, fighting one another and ruining other people's lives for financial gain and revenge, or simply out of boredom or inebriation.
IASIP is the longest-running American live-action sitcom in terms of total seasons, surpassing The Adventures of Ozzie and Harriet with the release of its 15th season in December 2021. In December 2020, the series was renewed for a total of four additional seasons, bringing it to a total of 18 seasons. The eighteenth season premiered on August 17, 2026.
The series has received critical acclaim, being described with ironic pejorative comparisons like "Seinfeld on crack" and "white trash comedy", and with many critics lauding the show's dark humor, satire, and the cast's performances. It has a large cult following.
Synopsis Premise The series follows a group of self-centered, heavy-drinking misfits, referred to as "the gang", who run a struggling Irish dive bar called Paddy's Pub in the neighborhood of South Philadelphia. In season one, the gang consists of janitor Charlie Kelly (Charlie Day), self-proclaimed bouncer Mac (Rob McElhenney), and bartender Dennis Reynolds (Glenn Howerton), the three of whom own Paddy's Pub, in addition to Dennis' twin sister Dee Reynolds (Kaitlin Olson), a struggling actress who works as a bartender there.
In the second season, they are joined by Frank Reynolds (Danny DeVito), an eccentric multi-millionaire and the neglectful father of the Reynolds twins, who takes over most of the ownership of the bar. He soon becomes the financial catalyst for the gang, funding many of the gang's convoluted schemes and urging them to go further with their brazen depravity.
The main characters in IASIP are generally depicted as ignorant in individual ways, often in both main plots and subplots of episodes. Episodes usually find the gang hatching elaborate schemes and regularly conspiring, against both outsiders and one another, for personal gain, revenge, or simply schadenfreude; these schemes fail in various ways with consequences that characters fail to manage, or exploit.
The show has been described by critics as satirizing racism, misogyny, ableism, homophobia, transphobia, xenophobia, antisemitism and Islamophobia in various depictions of the gang failing to handle everyday situations or to negotiate with comparatively adjusted members of society.
Themes
Some of the subjects covered for the purpose of satire on the show include masculinity and misogyny, Catholicism, classism and income inequality, racism including blackface, sexual coercion and stalking, child sexual abuse, homophobia, transphobia, American nationalism and substance abuse. The show frequently satirises American domestic and foreign policy stances and debates with its depictions of gun violence, abortion rights, climate change, torture, police brutality, the Israeli occupation of Gaza, the 2008 financial crisis and the COVID-19 recession. The show also skewers lighter topics such as social norms, using the gang's stupidity as a vehicle to poke fun at conventions.
Class and class conflict is a recurring theme throughout the show as Mac and Charlie Kelly are shown to be from working-class backgrounds, while Dennis and Dee Reynolds had an upper-class upbringing, even if they are no longer upper class. Frank Reynolds, who originally came from a working-class background, is shown to be a multi-millionaire, potentially even a billionaire, who made his money through fraud and exploitative business practices, including running sweatshops in developing countries, cheating his business partners and setting up shell companies for tax evasion.
IASIP also frequently engages in absurdist and meta humor, pulling from a variety of television, film, theatre and musical references. Some episodes see the gang in different settings, genres or even time periods.
Cast and characters
The show features a core cast of five characters and a recurring cast of colorful side characters, including the Waitress, Cricket, the McPoyles, the Ponderosas, the Lawyer and various family members like Mrs. Kelly, Mrs. Mac and her estranged husband Luther, and Uncle Jack Kelly, who cross paths and interact with the gang in increasingly unhinged ways as the show progresses.
Main
Charlie Day as Charlie Kelly, co-owner and janitor of Paddy's Pub. Charlie is a childhood friend of Mac, and high school friend of Dennis and Dee. He lives in squalor with Frank, as his roommate and pseudo-father, where they share a bed. Charlie has deep-seated psychological problems, partly due to frequent substance abuse, and partly due to his complicated family background, involving child abuse and neglect. He has an extensive history of pica and regularly eats various items not meant for human consumption, such as cat food, stickers, paint, and crow eggs. Due to his ignorance, misunderstanding of social norms, and illiteracy, Charlie is generally regarded as the stupidest member of the gang. Despite this, Charlie can innately read Irish Gaelic, is a naturally gifted musician, and possibly the only competent worker at Paddy's with his knack for unorthodox maintenance practices ("Charlie Work"). He also has an obsession with "The Waitress", a recurring character who he stalks and harasses. Glenn Howerton as Dennis Reynolds, co-owner and the main bartender of Paddy's Pub, in addition to being Dee's twin brother and Frank's son. Seemingly the most intelligent and normal of the three co-owners, Dennis is slowly revealed to be the most narcissistic and sociopathic of the gang. Dennis is extremely insecure, self-centered, and vain. He is overly concerned with the people around him buying into an image of him as intelligent, cultured, attractive, and of high status. At his most delusional, he refers to himself as a "Golden God" and flies into fits of rage when he believes he is being disrespected. Dennis' vanity is partly fed by his roommate and best friend Mac, who is in love with him, and is hinted to be a result of his mother preferring him to his twin sister Dee. Dennis' predatory nature is often depicted through numerous schemes to seduce women, typically much younger than him. It is hinted at times that Dennis may secretly be a serial killer, though this is a running gag, and not a confirmed characteristic. In season 10, Dennis is diagnosed with borderline personality disorder, though it is not clear if the diagnosis was definitive, according to Glenn Howerton. In the season 12 finale, Dennis reveals to the rest of the gang that he has an infant son, and moves to North Dakota to raise him. He inexplicably returns to Philadelphia in season 13, seeming to have abandoned his son. In later seasons, Dennis becomes even more preoccupied with his age and loss of general fitness and attractiveness, something the rest of the gang is aware of and uses to hurt and/or manipulate him. Rob McElhenney as Ronald "Mac" McDonald, co-owner and self-proclaimed "head of security" of Paddy's Pub. Mac is Charlie's childhood friend and Dennis's high school friend. Mac is insecure about his masculinity and homosexuality, constantly seeking the approval of those around him, especially his absent father, his apathetic mother, and his self-absorbed roommate Dennis. He often tries to prove himself and his perceived toughness to his father, who is a convicted felon. He has extreme bouts of body dysmorphia, and has been depicted at various weights throughout the series. Mac often brags about his hand-to-hand combat skills, but typically flees from physical confrontation and is usually depicted as the most cowardly of the gang. Mac is a Roman Catholic, though he often espouses strong Christian fundamentalist opinions, and his religion is regularly in conflict with his behavior and his homosexuality. It is insinuated for years that Mac is gay and harbors feelings for his best friend Dennis, though he remains in denial, much to the gang's annoyance, until he comes out in season 12. Kaitlin Olson as Deandra "Sweet Dee" Reynolds, bartender at Paddy's Pub, as well as Dennis's twin sister and Frank's daughter. Initially Dee could be considered the gang's "voice of reason" however, Dee quickly loses any sense of moral fortitude and is shown to be just as prejudiced and depraved as her male colleagues within a few episodes of season 1. Dee is frequently the subject of the gang's casual misogyny, leading to her resenting them and plotting against them and others whom she deems more successful than herself. Like her brother, Dee is deeply insecure, though unlike him, she was a disappointment to her mother; so she craves approval from Dennis and Frank in any way. Though often the butt of the gang's jokes, she nevertheless stays involved with them because of her desperate need for attention. Unlike the men, Dee lives alone and does not hold any ownership stake in the bar, in part due to her desire to become a professional actress/comedian (an ambition she consistently fails to achieve because of her debilitating stage fright and her lack of talent). Dennis and Dee are frequently shown to be two sides of the same coin, with Dee often being depicted engaging in predatory behavior towards young men. Danny DeVito as Frank Reynolds (season 2–present), the legal father of Dennis and Dee Reynolds (despite having no biological children of his own) and the majority owner of Paddy's Pub soon after his introduction onwards. Frank is a multi-millionaire who often funds and enables the gang's worst schemes and impulses, just to feel a sense of youthfulness and energy. He was once a successful businessman with a long history of illegal operations, including running sweatshops in Vietnam, and dealings with sordid characters. He has since embraced his "feral" nature and describes himself as "fringe class". Despite his substantial financial resources, he chooses to share a decrepit one-bedroom apartment with Charlie, where they sleep together on a pullout couch and have a codependent pseudo-familial relationship. The two have similar interests, such as playing Night Crawlers, collecting trash, boiling denim, eating garbage, and foraging naked in the sewers for rings and coins. Frank often arms himself with at least one loaded handgun – usually a snubnosed revolver – and does not hesitate to brandish or even discharge one when provoked, and has been known to snort cocaine as part of his daily routine. Whenever the gang gets into trouble, Frank is happy to embrace his status as a multi-millionaire and bail them out.
Production
Conception Charlie Day, Glenn Howerton, and Rob McElhenney first met each other while auditioning for Tuck Everlasting and other projects in New York City and, later, in Los Angeles—they were going up for similar parts, moved to Los Angeles around the same time and even had the same manager, Nick Frenkel. Day and Howerton, notably, got to know each other on a car ride back from testing for That '80s Show in late 2001, when Howerton was cast as Corey Howard, although Day did not get the part of his best friend.