Mary McCartney, 45, is the very definition of a “someone.” The oldest child of the musician Paul McCartney and Linda McCartney, Mary grew up amid wealth, privilege and celebrity. Now a professional photographer based in London, Ms. McCartney has an all-access pass to a vast assortment of glossy events and glittering parties, as well as a long list of elite corporate clients, including Mandarin Oriental Hotel Group and her kid sister Stella’s fashion label.
But some of her most popular work focuses on revealing the extraordinary poignancy of routine moments experienced by ordinary people. Ms. McCartney snaps photos of strangers on her iPhone and shares them with nearly 30,000 followers on Instagram.