While relatively few plot details are known so far about the highly anticipated third season of Netflix's Orange Is the New Black, there has been a fair amount of information that has been revealed over the past few months.

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Orange Is the New Black will not be streaming until mid-2015, though casting details are slowly being revealed. Taylor Schilling (who plays Piper Chapman) and the rest of the starring cast are all returning for Season 3, though there are also many promotions.

Laura Prepon (Alex) is returning to a starring role after only appearing in four episodes of Season 2. She was previously listed as a series regular in Season 1. Additional actresses being promoted to series regular status for Season 3 are Selenis Leyva (Gloria), Adrienne C. Moore (Black Cindy), Dascha Polanco (Daya), Yael Stone (Morello) and Samira Wiley (Poussey).

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Nick Sandow (Caputo) has also been promoted to series regular now that his character has become the assistant to the warden of Litchfield.

There are a few guest stars who have been announced for Season 3, including Oscar winner Mary Steenburgen, who is playing the mother of Pornstache (Pablo Schreiber), Fringe actress Blair Brown and comedian Mike Birbiglia. The roles for Brown and Birbiglia have not yet been announced publicly. Lori Petty is also returning for Season 3 in her role as Lolly.

The appearance of Pornstache's mother is interesting considering Schreiber is not returning for Season 3. Could his mother be trying to get custody of Daya's baby, considering many people in the show are still under the assumption that Pornstache is the father?

The specific plot and overall story arc of the third season has not been revealed either, though series creator Jenji Kohan previously told The Hollywood Reporter it will be about "faith." Piper Kerman, who wrote the book on which the series is based, added that it is an "exploration of faith."

The cast has said a number of things in describing the third season. Polanco said that the third season is "weird" while Natasha Lyonne, who plays Nicky, said that the season features "so much bloodshed."

Orange Is the New Black returns for Season 3 in mid-2015 on Netflix.