Collins will star as Dylan, someone from Bridget and Siobhan's (Sarah Michelle Gellar) past when they were in Tahoe. Dylan plays a pivotal role in the sisters' lives. As it turns out, he's part of a reason the sisters had a falling out.
Collins, known for playing Castiel on the CW's 'Supernatural,' will first appear alongside Gellar in episode 14, which means that we'll have to wait until after 'Ringer' returns from its midseason break to catch Collins in action.
Other notable 'Ringer' guest stars include Amber Benson and Jason Dohring.
'Ringer' airs on Tuesdays at 9PM ET on the CW.