However, actor Isaac Hempstead-Wright has revealed he isn’t the biggest fan and is unsure why it’s become such a popular prediction among fans of the HBO series.
Speaking at the season eight premiere in Belfast, the actor – when asked if there are any theories doing the rounds that he likes – told journalists, including The Independent: “I tell you what isn’t my favourite theory; the Night King one.”
The 20-year-old actor was later pressed on the theory during an appearance on The Tonight Show Starring Jimmy Fallon and remained equally as coy. When asked if Bran is the Night King, he said: “I think he’s the Three-Eyed Raven, who is definitely on the side of the living.”
He also told W Magazine he’s confused as to why people have fixated on this particular theory.
“People just seem to think it’s happening,” he said. “I can’t see how there have been any clues for it, but it just seems to have really gained traction. But yeah, you’ll have to wait and see.”
Fans of Thrones seem to have misinterpreted one of Bran’s lines of dialogue in the season eight premiere, which aired on Sunday night.
One moment in the new instalment, which featured a scene that’s essentially been eight years in the making, saw Bran Stark (Isaac Hempstead-Wright) tell Sam Tarly (John Bradley) that he was “waiting for an old friend”.
Fans thinking Bran was referring to Jaime Lannister, though, could be incorrect.
The opener also included a hilarious reference to last season’s controversial Ed Sheeran cameo as well as a terrifying death at the hands of the Night King that has people theorising over his true identity (no, not Bran Stark).
Viewers in China were left furious after six minutes of the episode – which broke HBO records – was censored by tech corporation Tencent.
You can find our extensive ranking of every character – from worst to best – below.
The show will be available on Sky Atlantic and NOW TV in the UK.