Patti LuPone’s run on American Horror Story: Coven fizzled out courtesy of a rather lackluster climax for her character, but she’ll get another opportunity to go big in the realm of small screen supernatural horror soon enough because Showtime just announced that she’s joining the cast of Penny Dreadful as a guest star.

It was also officially announced that season 1 vets Helen McCrory and Simon Russell Beale are getting bigger roles this time around, joining Josh Hartnett, Timothy Dalton, Eva Green, Reeve Carney, Rory Kinnear, Billie Piper, Danny Sapani and Harry Treadaway as series regulars.  Hit the jump for more on what’s coming in Penny Dreadful season 2.

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Image via Showtime

The press release doesn’t give any specifics on LuPone’s character, but does note that she’s of “great importance” to Vanessa’s past.  Hopefully that means we’ll get another Vanessa flashback episode because “Closer Than Sisters” is easily one of the best of season one, but, of course, LuPone’s character could always be someone Vanessa knew way back when who steps back into her life again in the present day.

Show creator John Logan announced that McCrory’s Madame Kali would become the new villain at San Diego Comic Con.  He also showed off a clip that was pulled from season 1 that will make it into season 2 featuring Madame Kali telling Beale’s Ferdinand Lyle about how much she despises Vanessa, so it was no surprise to learn that his role is getting beefed up as well.

In addition to LuPone, the Penny Dreadful guest star lineup will also include Douglas Hodge, Sarah Green and Jonny Beauchamp.  Hodge will portray Bartholomew Rusk, a Scotland Yard investigator who’s determined to catch the individual responsible for the brutal murders in London.  Greene will probably be joining the bad guys because she's playing Hecate, Madame Kali’s powerful daughter.  (It’s going to take a while to get used to calling Kali by her real name, Evelyn Poole.)  And lastly, Beauchamp’s character is simply described as “a young man with a singular past.”

Penny Dreadful season 2 goes into production this month in Dublin, Ireland and will debut on Showtime in 2015.

Penny Dreadful Season 2 Casting, Patti LuPone