John Dezso Ratzenberger (born April 6, 1947) is an American actor, voice actor and entrepreneur. He is best known as Cliff Clavin in Cheers and for his recurring supporting cast roles in Pixar films. Ratzenberger was born in Bridgeport, Connecticut, the son of Bertha Veronica (née Grochowski), who worked for Remington Arms, and Dezso Alexander Ratzenberger, a Texaco truck driver. His father was of Austrian and Hungarian descent, and his mother was of Polish ancestry. He attended St. Ann's School in Bridgeport and Sacred Heart University in Fairfield, Connecticut. In 1969, Ratzenberger was a tractor operator at the Woodstock Festival. He moved to London in 1971 and stayed there for 10 years.
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