"American Horror Story: Freak Show" will bring some new faces to the FX series, but not all of them are confirmed.

On July 24, creator Ryan Murphy announced the addition of an "All My Children" alum who also worked with the executive producer on the HBO movie "The Normal Heart," which Murphy directed.

"Thrilled to announce the very talented FINN WITTROCK has joined the cast of Freak Show!" he announced via Twitter.

On July 17, Murphy also uploaded a picture of what appears to be Sarah Paulson's role, which has been announced as freaks Dot and Bette who seem to be conjoined twins.


(Photo : Ryan Murphy/Twitter)

"Dot and Bette's first day," the caption reads.

Meanwhile, exclusive "American Horror Story: Freak Show" cast information was allegedly leaked via Facebook on July 21. A fan site from Argentina claims to have uploaded a picture of the official call sheet that names the cast members and their respective characters.

Surprising cast additions include the return of some familiar faces. According to the call sheet, Naomi Grossman ("#Rip") plays Pepper, a character previously introduced in Season 2, dubbed "Asylum." According to Huffington Post, bringing back the character makes sense as the character "was inspired by the 1932 cult film 'Freaks' and real sideshow performer Schlitzie."

Other returning characters featured on the list are Penny the Candy Striper from Season 3, dubbed "Coven." The sheet lists Grace Gummer ("Frances Ha") as reprising the role.

In addition, the name of John Carroll Lynch ("Shutter Island") appears on the mysterious call sheet. The actor is listed as portraying a character named Twisted Clown.

FX has not commented on the rumors.

"American Horror Story: Freak Show" begins on FX in October.

On Monday, John Landgraf, FX Networks CEO, described the tone of Season 4.

"Some years it's going to be big and bright and brash and campy the way 'Coven' is," he said at the Television Critics Association press tour in Beverley Hills. "Other years it's going to be dark and brooding, like 'Asylum' was. I guess I would put 'Freak Show' half-way in between the two. It's not quite as brooding and formal and Hitchockian as 'Asylum.' It's got a little bit more humor and a little bit more camp, but it's got a brooding period feel to it also."
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Follow Scharon Harding on Twitter: @ScharHar.