Millarde directed his last film in 1927 and died of a heart attack in New York City in 1931. He was married to actress June Caprice (1895-1936), whom he had directed in eight films for Fox.
Their daughter, June Elizabeth Millarde, was 14 years old when her mother died. Raised by her grandparents in Long Island, New York, she became a cover girl known as Toni Seven. The June 17, 1949, issue of Time reported she was the heiress to an estimated $3-million fortune.