【Watch Porn Story Episode 10 full video】

LONDON -- Game of Thronesfilming has started up again,Watch Porn Story Episode 10 full video cast sightings in Belfast have peaked, and speculation about what's in store for Season 7 is quickly gathering momentum.

We already know that British legend Jim Broadbent will have a role in the next Season, but -- as usual -- showrunners are keeping tight-lipped about new characters and plot-lines at this early stage.

SEE ALSO: 9 key predictions for what'll happen in 'Game of Thrones' Season 7

Still, that doesn't mean we can't speculate.

Introducing Devin Oliver, the singer for American band "I See Stars."

View this post on Instagram

Remind you of anyone?

A few days ago, Oliver shared the following, cryptic post on Instagram.

View this post on Instagram

Hmm.

It wasn't long before the speculation started.

Original image has been replaced. Credit: Mashable Original image has been replaced. Credit: Mashable

The Instagram post eventually made its way to the r/gameofthrones subreddit, where the speculation reached fever-pitch.

Mashable Top Stories Stay connected with the hottest stories of the day and the latest entertainment news. Sign up for Mashable's Top Stories newsletter By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!

Original image has been replaced. Credit: Mashable

So, is Devin Oliver going to be playing Rhaegar Targaryen -- ie. Daenerys' deceased older brother -- in Season 7?

Well, despite the fact that he's a singer rather than an actor, it's always possible. As many people pointed out on Reddit, we know from the books that Rhaegar enjoyed singing, and -- given the Season 6 flashback that all but confirmed the R + L = J theory -- it wouldn't be a surprise if we were to see more of Jon Snow's real dad in the coming season.

Game of Throneshas a history of casting relatively unknown actors, too, so Oliver's lack of IMDb credits wouldn't necessarily be an obstacle.

Also, he really does look the part.

View this post on Instagram

Still, nothing is confirmed at this stage.

Oliver might be joking, or he might simply be in Season 7 in a much minor role.

Mashablehas reached out to HBO for comment and we will update this article if we receive a response.

UPDATE: Sept. 29, 2016, 5:33 p.m. BST A spokesperson from HBO told Mashablethey don't comment on casting speculation.

Bonus: Game of Thrones cast blows up social media with Season 7 news

Topics Game Of Thrones

(Editor: {typename type="name"/})