Some big casting news (via DC Ent.) for Supergirl has been announced. Warner Bros. and CBS have announced that actress Italia Ricci (Chasing Life, Don Jon) has been cast in the role of Siobhan Smythe, a.k.a. Silver Banshee! On the TV series, Siobhan will be Cat Grant’s latest hire, whom at first will be a work nemesis for Kara before she later becomes a far more deadly foe for Supergirl when she takes on the mantle of DC Comics villain, Silver Banshee. There is no mention as to when we will see Ricci debut as Smythe on the show, but one would suspect it will be not too long after the mid-season break. New episodes of Supergirl premiere on Mondays at 8 p.m. EST on CBS.