Potential spoilers ahead from "Game of Thrones" Season 8.

"Game of Thrones" is down to its final season, but new roles are still being added for the final six episodes. Or are they existing roles with younger actors? Watchers on the Wall just shared some intel on casting taking place this week in the U.K., with the HBO show looking for two standout child actors -- one girl, and one boy. Are they younger versions of characters we know, or brand new for Season 8?

Pre-production is already in session, with the actors meant to return for filming in October. These new roles are scheduled to start filming in November and December.

Here are the casting breakdowns from WotW:

NORTHERN GIRL: "The first role we've learned about is for a Northern Girl. The character will be around age 8, but they are open to seeing actresses older than this, up to age 10. The role is described as being a straight-talking Northern-accented girl, someone remarkable for her dauntlessness and integrity. According to the write-up, she's been brought up in a family of soldiers and shares their fearlessness. The part is said to be a 'very nice stand-out part for a strong-minded young girl with a fighting spirit.' The role of the Northern Girl is currently set to shoot during the week commencing November 17th."

BOY: "Game of Thrones is also searching for a Boy aged 8 – 12, with a physically fit and agile look, someone with a good, distinctive face. He's described as being from a poor background, a boy who has to fight to make his way in the world. The description we saw mentions that they need an actor who can 'completely own the scenes that he appears in,' hinting at multiple scenes. No coloring or height was noted, for what it's worth. The young actor is currently scheduled for filming the last week of November and the last week of December, but as always with Game of Thrones, things can change."

The Northern girl sounds like both Lyannas we know -- Mormont and Stark. Could we be getting Lyanna Stark flashbacks to her youth? If not, who is this girl and her standout part? A wildling? Daughter of Tormund?

The boy. Some fans think that might be young Varys. Or Bronn? Or the boy could be one of the "little birds" who provide information. We'll see.

"Game of Thrones" Season 8 has no premiere date at this point, but we recently heard that they'll be shooting multiple endings to try and avoid the usual spoilers. What they really need to do is figure out how to avoid an entire season rundown leaking from their own camp in advance. And then don't let the HBO contractors leak the episodes the week before they air.

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