Kamen was born in New York City, USA and studied at the New York High School of Music & Art in New York, then at Juilliard's School for Music Dance and Drama in New York.
Kamen was born in New York City, USA. He was the second of four sons of a Left-wing Jewish dentist and his teacher wife and studied at the New York High School of Music & Art in New York, then at Juilliard's School for Music Dance and Drama in New York.