Began his career as a mimic and novelty singer with the Horace Heidt Orchestra
Made his screen debut in a bit part in "Pot o' Gold," which was his last feature appearance for over 20 years
Worked in radio with Horace Heidt, on "The March of Time," doing impersonations of politicians in the news and often partnered with character actor Ollie O'Toole, and as second banana to Fred Allen, Edgar Bergen and Bert Lahr
Served in the U.S. Army and was hit by shrapnel at Normandy's Omaha Beach landing, suffering a leg wound that left him with a slight limp
Made his TV series debut as Charlie the doorman and Newton the waiter on "The Morey Amsterdam Show" (CBS, 1948-1949; DuMont, 1949-1950)
Was a regular on DuMont Network's "Cavalcade of Stars"
Introduced his Ed Norton character on "The Honeymooners" skit on "Cavalcade of Stars"
Was a regular on the NBC variety series "Henry Morgan's Great Talent Hunt"
Co-starred on "The Jackie Gleason Show" and reprised the character of Ed Norton in "The Honeymooners" sketches, for which he won three back-to-back Emmy Awards in 1953, 1954 and 1955
Played Norton in the sitcom "The Honeymooners" (CBS)
Broadway debut, "The Rope Dancers"
Headlined a series of TV specials for NBC
First major screen role, "The Yellow Rolls-Royce"
Originated the role of Felix Unger on Broadway in "The Odd Couple"
Returned to his status as a regular on "The Jackie Gleason Show" (CBS)
Earned a Tony Award nomination for his role in the stage play "Lovers" by Brian Friel
Won the Best Actor Oscar for his performance as a senior citizen in "Harry and Tonto"
Delivered one of his best film performances as an aging detective investigating his partner's murder in Robert Benton's "The Late Show"
Starred in the short-lived NBC series "Lanigan's Rabbi"
Teamed with George Burns and Lee Strasberg for "Going in Style"
Had a featured role in "The Muppets Take Manhattan"
Won his sixth Emmy for a supporting role in "Terrible Joe Moran" (CBS), starring James Cagney
Final onscreen teaming with Jackie Gleason in the title roles of the CBS TV-movie "Izzy and Moe"
Had a recurring guest role as James Cavanaugh on the CBS sitcom "The Cavanaughs"
Hosted "Jackie Gleason: The Great One," a posthumous CBS tribute to Gleason
Made his last TV movie "Where Pigeons Go to Die" (NBC)
Final feature appearace to date in "The Last Action Hero"