Katie Lynch Koglin is the Cape’s go-to harpist for special occasions. She’s performed at two funerals already this week, and she’s no stranger to weddings. In fact, earlier this month, the Cotuit-based Koglin played at a wedding rehearsal dinner for “Saturday Night Live’’ star Andy Samberg and “Gossip Girl’’ actress Leighton Meester. The stars of the comedy “Donny’s Boy,’’ which is still filming on Cape Cod, get married in the film and Koglin was hired to play as the actors shot the pre-wedding dinner scene at the Wychmere Harbor Club. Koglin was quick to tell us that, technically, she didn’t play a note while the cameras were rolling. The movie’s music department chose a score - Puccini and Rachmaninoff - that will be mixed into the film. So Koglin played along silently. “I had to match the recording that they were going to use,’’ Koglin told us.
