He studied at Columbia University and at the City College of New York and performed in Broadway plays. For a time, he also worked in psychiatric clinics at Queens General Hospital and Bellevue Hospital.
He coincidentally played characters named Walter Paisley on six different occasions.
He grew up in the Bronx neighborhood of New York City. He married Lainie Miller in 1959.
Miller's career was greatly advanced by director Roger Corman, who cast him in multiple films.