With just three more episodes remaining in Game of Thrones' current season, many fans are already wondering what new characters will be introduced in Game of Thrones Season 6 next year. Casting breakdowns for the upcoming season have already been leaked, but, unlike seasons' past, where these breakdowns gave the actual characters' identities, HBO has not revealed the specific characters this time around. However, the breakdowns themselves offer plenty of hints at who some of these roles could be. If you aren't caught up with Game of Thrones Season 5, there may be SPOILERS below, so read on at your own risk.

The first character is described as a pirate in his late 40s to early 50s, who has "terrorized seas all around the world," described as "cunning, ruthless, with a touch of madness." There is speculation that this character may be Euron Greyjoy, the uncle of Theon Greyjoy/Reek (Alfie Allen), since there have been previous rumors that he would show up in Game of Thrones Season 6, and this is said to be a "very good part this season." While we still have three episodes left of this current season to see what will happen to Theon/Reek, it's possible that Euron could show up seeking retribution for the emasculation of Theon at the hands of Ramsay Bolton (Iwan Rheon).

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The second character poses perhaps the most intriguing possibility for Game of Thrones Season 6, if the speculation on who he is turns out to be accurate. The character is a father in his 50s or 60s, who is one of the greatest soldiers in Westeros history, a "humorless martinet" described as severe and intimidating. The character will have a "very good part" next season and will be "centrally involved" in one of the protagonist's story lines. This character is believed to be Randyll Tarly, the father of Samwell Tarly (John Bradley), who was actually mentioned by Stannis Baratheon (Stephen Dillane) earlier this season, which some fans thought could pave the way for Randyll making an appearance in Season 6.

As for the other characters, there is a brother, sister and mother, who, like the "father" role, are "centrally linked" to a protagonist's story, which could mean these roles are for Sam's mother, his brother Dickon and one of his sisters. There is also a priest in his 40s or 50s, an ex-soldier before finding religion, who could be Septon Maribald, along with a leading actress in a travelling theatre troupe, a young priestess and a fierce warrior. The last three roles, all young boys, are speculated to be a part of another flashback scene, perhaps through the Weirwood tree that Bran found at the end of Season 4. Each character has rather specific character descriptions, down to their hair and eye color, so it's possible they could be looking for actors to match up to established characters. It's worth noting that one of the boys is said to have green eyes, the same as Sean Bean, so it's possible the new season could feature a young Ned Stark. What do you think about these new casting details? Here is the complete breakdown:

Pirate: Man in his 40's to late 50's. He's "an infamous pirate who has terrorized seas all around the world. Cunning, ruthless, with a touch of madness." He's a dangerous-looking man. A very good part this season.

Father: Aged 50's to 60's, he's one of the greatest soldiers in Westeros- a humorless martinet, severe and intimidating. He demands martial discipline in the field and in his home. It's described as "a very good part" for next year and that he's "centrally involved" in a protagonist's storyline.

Mother: In her 50's. She's a sweet, plump, and adoring mother, and has a soft spot for one of her children who benefits from her decency.

Sister: In her early 20s. She's a kind, friendly and unpretentious woman.

Brother: In his early to mid-20's . Athletic, a good hunter, an excellent swordsman, manly, not particularly bright but the favourite child of the father.

Priest: In his 40's or 50's. A gruff ex-soldier who found religion. Now a no-nonsense rural priest who ministers to the poor of the countryside. He's salt-of-the-earth man who has weathered many battles.

Leading Actress: In her early 40's, she's an elegant actress with a traveling theatre company. Fun, charismatic, rum-drinking actress in the troupe.

Priestess: Mid-20's to early 30's. Any ethnicity- she's beautiful, intense, and magnetic.

Fierce Warrior: A tall man in 30's or 40's with a powerful physique. They're looking for someone with "mixed ethnicity" for the role.

A large boy: With an actor who is 10-12 but playing 7 or 8. He's described as "a clever boy" who seems too large for his age. He's big and tall but not fat. "Characterful squat features" are a plus for this part. it's specified that this is a one-time appearance.

12 year old boy: With brown hair and blue eyes. He needs to use a Northern accent. He has scenes where he has to spar with a wooden sword. The length of the role isn't specified.

7 year old boy: With dark brown hair, a narrow face and green eyes. He also has a Northern accent. He also spars with the wooden sword, so it's safe to assume it's the same scene. This role is similarly open-ended, the description only stating that the character is being 'introduced.'