Actor Graham Phillips, best known for his role on CBS' 'The Good Wife', has been cast to play a character named Nick St. Clair, on The CW?s teen drama 'Riverdale. Reports say St. Clair will be an ex-boyfriend of Camila Mendes' Veronica Lodge. Riverdale creator Roberto Aguirre-Sacasa says of the casting, "Nick is an old classmate of Veronica?s from New York, and despite his parent-pleasing veneer, he is a wolf in sheep?s clothing: a hard-partying Lothario with dark desires and an unchecked sense of privilege." 'Riverdale' returns for its second season on The CW October 11.