American Horror Story actor Denis O'Hare has revealed when he is starting production on the upcoming fifth season, titled Hotel.

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O'Hare, who is returning for the next season of American Horror Story, told a fan on Twitter recently that filming is actually starting today, for O'Hare at least.

So it looks like at least O'Hare will be present on the set on Monday, though the presence of other actors is not yet confirmed. Considering O'Hare will be there for presumably the first day of filming, he may have an important character in the upcoming season.

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American Horror Story: Hotel features a stellar cast that includes O'Hare, Sarah Paulson, Kathy Bates, Angela Bassett, Evan Peters, Finn Wittrock, Matt Bomer, Wes Bentley, Cheyenne Jackson, Chloë Sevigny, Max Greenfield and Lady Gaga.

Not much is known as far as plot but AHS boss Ryan Murphy has teased some character details on Twitter. He said that Bates' character will be running the hotel while Paulson will play "the baddest bad girl of all," a departure from her usually good characters.

He said that the audience will meet Peters' character in "Room 64," which sounds menacing, while Bassett and Gaga's characters will interact "in the ballroom." And speaking of Gaga, she will apparently be in a love triangle with Bomer and Wittrock's characters.

American Horror Story: Hotel premieres in October on FX, though the network has not yet announced an official premiere date.