Daniel Patrick Harrington, Jr., was born on August 13, 1929, in New York City. He graduated from Fordham University in 1950, and served in the military. Upon his discharge from service, Harrington Jr. decided to follow in the footsteps of his father, a legendary comedic actor and vaudevillian performer. His career began with a job at NBC in New York, and he continued to act and perform in live theater.
Harrington's first taste of fame beyond the realm of his famous father was as a member of Steve Allen's TV comedy troupe, "Men on the Street," an ensemble that included the likes of Don Knotts, Tom Poston, and Louis Nye. He also performed the beloved recurring character of comedic Italian immigrant "Guido Panzini" on The Jack Paar Show
From there, Harrington amassed an impressive series of television credits including roles on The Pink Panther Show, The New Andy Griffith Show alongside legendary performer Andy Griffith, The Partridge Family, Columbo, and The New Dick Van Dyke Show with beloved actor Dick Van Dkye.
In 1975, Pat found himself cast in what is perhaps his most prolific role, agreeable building superintendent Dwayne Schneider on popular '70s sitcom, One Day at a Time, with Valerie Bertinelli. During his tenure at One Day at a Time he took home an Emmy, a Golden Globe, and amassed a dozen writers credits.
Harrington continues to be a presence on the small screen today, and has recently been seen on Curb Your Enthusiasm, and The King of Queens. He has four children, and worked with son Michael on an episode of Who's the Boss.