British actor Dominic Sherwood ("Vampire Academy") has been cast as Jace, the male lead in ABC Family’s "Shadowhunters" based on Cassandra Clare's novel series "The Mortal Instruments”. The story follows eighteen-year-old Clary Fray (yet to be cast) who finds out on her birthday that she is not who she thinks she is, and that she comes from a long line of Shadowhunters, human-angel hybrids who hunt down demons.