Watch : Sam Smith Confirms Engagement to Christian CowanSam Smith is no longer dancing with a stranger. After all, the "Unholy" singer is engaged to Christian Cowan after three years of dating, confirming to New York Times in an interview published July 28 that the fashion designer is their fiancé. "For me, there’s something radical about being queer in this time, in this world, and singing love songs," the 34-year-old told the outlet. But Smith is also a muse for Cowan, 32, as well. "This look is a love letter to the king of fashion illustration," Cowan explained in a May Instagram post, "and to my love, Sam.”