Ritter, whose other TV credits include Breaking Bad and Veronica Mars, will play Rowan Mills, an analyst who works at a data security firm. It is not yet known how the character will fit in with the story line. TV Fanatic was first to report the news.
Ritter won't be the only leggy brunette to visit The Blacklist in Season 2. As previously announced,Weeds alum Mary-Louise Parker is joining the series on a recurring basis as a character with ties to Red Reddington (James Spader), and House of Cards' Mozhan Marno has been cast as a Mossad agent.
Season 2 of The Blacklist premieres Sept. 22 at 10/9c on NBC.
Check out what's on Ritter's Watchlist: