- Credited Charles Chaplin as one of his biggest influences. He cited Chaplin's instinct for pathos and comedy as the foundation for his own efforts to sculpt characters and connect emotionally with his audiences through dance.
- Children with Shelah Hackett: Amy Kidd and Matthew Kidd.
- Children with first wife: Kristine, Susan.
- His younger brother, Phil Greenwald, was a booking agent for the Concord Hotel in the Catskills.
- In his early days he was a for the New York Daily News.
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