Young appeared in dozens of movies and TV shows during his decades-long career. Some of his most notable flicks included "Chinatown," "Once Upon a Time in America," "Back to School" and "The Pope of Greenwich Village."
He also landed parts in 2 hit TV programs, "M*A*S*H" and "Baretta."
But, Young will always be remembered most for playing Paulie, the rough and tumble brother-in-law of Sylvester Stallone's Rocky Balboa.
They starred together in each of the five "Rocky" movies from 1976 to 1990, as well as the final one in the series, "Rocky Balboa," in 2006.
Young received an Academy Award nomination for his portrayal of Paulie in 1976, but lost to Jason Robards as Washington Post editor Ben Bradlee in "All The President's Men."