John Deszo Ratzenberger (born April 6, 1947) is an American actor, voice actor, entrepreneur, and leading advocate for skilled worker shortage crisis. He is best known for his role as Cliff Clavin in Cheers.
John Ratzenberger was born in Bridgeport, Connecticut, the son of Bertha (née Grohowski) and Deszo Alexander Ratzenberger. 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, living there for ten years.
Ratzenberger's work for Pixar, as well as his parts in Superman and The Empire Strikes Back, makes him the 4th most successful actor of all time, as measured by a total box office of over $3,000,000,000.