It's Always Sunny in Philadelphia - Cast and Characters

Cast and Characters

• Glenn Howerton as Dennis Reynolds – Dennis is a co-owner of Paddy's Pub and is Deandra's twin brother. The most sociopathic of the characters, Dennis is narcissistic, selfish, histrionic and vain. Much of his inflated ego is perpetuated by his Ivy League education at the University of Pennsylvania where he minored in Psychology.
• Kaitlin Olson as Deandra "Sweet Dee" Reynolds – Sweet Dee is Dennis' twin sister, the main bartender at Paddy's Pub and the show's main female character. Sweet Dee dreams of becoming an actress although she lacks any apparent talent and suffers from debilitating stage fright. She needed a back brace in high school and majored in Psychology at the University of Pennsylvania but did not graduate. Dee lives in an apartment alone, although she had a cat at one point until it became trapped in her wall.
• Rob McElhenney as Ronald "Mac" McDonald – Mac is Charlie Kelly's childhood friend and Dennis's high school friend and later roommate. He is a co-owner of Paddy's Pub. Though he sometimes brags about his hand-to-hand combat skills, he typically flees any type of physical confrontation. The son of a convicted felon, Mac is frequently trying to demonstrate his toughness and refers to himself as the "sheriff of Paddy's".
• Charlie Day as Charlie Kelly – Charlie was co-owner at Paddy's Pub but traded all his stocks for "goods and services", half a sandwich, and other unnamed reasons. He is a childhood friend of Mac and later high school friend of Dennis and Dee. He is also Frank's roommate. Charlie does most of the dirty work (referred to as "Charlie work") at the pub, is borderline illiterate, an alcoholic and substance abuser, and is often seen huffing glue. He suffers from deep psychological problems, and lives in squalor. An abortion survivor, Charlie has extreme anger issues and often screams to get his point across. He has a severely unhealthy obsession with "The Waitress" though she finds Charlie repulsive and shows no interest in him. The Waitress is played by Charlie's real life wife.
• Danny Devito as Frank Reynolds (Season 2–present) – Frank is the legal father of twins Dennis and Sweet Dee, and possibly the biological father of his roommate Charlie. He used to be a successful businessman with a long history of illegal operations and dealings with sordid characters, but chose to abandon that life and redeem himself after leaving his money-grubbing, cheating wife. He now shares a tiny, filthy one-bedroom apartment with Charlie, where they share a pullout couch.