Daniel Maurice Alan Macmillan, Viscount Macmillan of Ovenden is a British fashion designer and the only son of Alexander Macmillan, 2nd Earl of Stockton. As the heir apparent to an earldom, he uses his father's secondary title of Viscount Macmillan of Ovenden as a courtesy title. He is a great-grandson of Prime Minister Harold Macmillan, 1st Earl of Stockton.