There's no one better at secrecy than the cast and crew of Game of Thrones - which makes it all the more surprising that the plot for the much-anticipated series finale has somehow made it online.

Jaime Lannister himself - aka Nikolaj Coster-Waldau - made the startling confession during an interview with the Observer.

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"If you go online you can definitely read every plot point that's going to happen," he told the publication.

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"You can find the ending of Game of Thrones on the internet. It's there. But you wouldn't know. Of course, nobody really wants to know."

The actor also revealed that he's actually dropped some accidental spoilers himself - and that none of us noticed.

Nikolaj Coster-Waldau as Jaime Lannister with Lena Headey as Cersei Lannister. Photo / HBO
Nikolaj Coster-Waldau as Jaime Lannister with Lena Headey as Cersei Lannister. Photo / HBO

"For years there was the whole thing with 'book readers' who knew what was going to happen. But it is more intense now, because nobody knows," Coster-Waldau admitted.

"There has been a couple times where I've actually, by accident, said something I shouldn't have. But because nobody knows, they don't necessarily pick up on it."

In any case, we won't have to wait too much longer to find out what happens in the seventh and final season of the hit show: it will premiere on HBO on July 16 and conclude on August 27.

Meanwhile, it was recently revealed that the fantasy saga is set to live on in the form of multiple spin offs.

According to Variety, HBO has confirmed it has closed deals with four different writers to explore possible spin-offs of the hit drama, which is based on a book series by George R.R. Martin.

No timeline is yet in place for the development of the projects.