John Ratzenberger (born April 6, 1947 in Bridgeport, Connecticut) is an American actor. Ratzenberger is perhaps best known for his role as "Clifford C. 'Cliff' Clavin, Jr." in the Cheers (1982) TV Series.
He was born to Roman Catholic parents: Deszo Alexander Ratzenberger, of German heritage, and Bertha Grohowski, of Polish stock.