<Li> Alexandra Daddario (sister) </Li> <Li> Emilio Q. Daddario (grandfather) </Li> <P> Matthew Quincy Daddario (born October 1, 1987) is an American actor . He is best known for his role as Alec Lightwood on the Freeform television series Shadowhunters (2016--present). He is the brother of actress Alexandra Daddario . </P> <P> Daddario was born and raised in New York City, the son of Christina, a lawyer, and Richard Daddario, a prosecutor and former head of NYPD Counterterrorism under Mayor Michael Bloomberg . His older sister is actress Alexandra Daddario; he also has a younger sister Catherine Daddario . </P>

Who plays alec lightwood in the tv series