Marks was born in New York City in 1932 to vaudevillians parents. He attended Duke University in North Carolina where he obtained his bachelor degree. He then enlisted the in the U.S. Navy. He died at his home in Los Angeles in 2006 of pancreatic cancer.
Dennis Marks was an American screen writer, voice actor and producer. He worked for some of the most popular animation shows of the 60's and 70's. He worked for DC on shows as The Batman/Superman Hour and Batman: The Animated Series. He worked for Hanna-Barbera and Marvel on TV shows as The Incedible Hulk and Spider-Man where he also voiced the Green Goblin.
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