HBO has done everything in its power to keep spoilers from the final season of Game of Thrones from leaking to fans. Since the George R.R. Martin novel series for which the series is based has yet to conclude, there is no telling what will happen in Westeros after the Night King attacks.However, there are people who know how Game of Thrones ends and that includes members of the cast and the main production team. Of course, they have been sworn to secrecy, and while most have kept that secret to themselves, Kit Harington decided it was a good idea to tell his wife.RELATED: Naomi Watts Comments on Joining Game of Thrones FranchiseIn an interview with U.K. radio station KISS FM, Harington -- who stars on the show as Jon Snow -- said his wife Rose Leslie asked him how it ended but after he told her, she wouldn't talk to him for about three days.This isn't the first time Harington has spoiled Game of Thrones. He also told a police officer who pulled him over whether Jon Snow lived or died after the Season 5 finale in order to get out of a traffic ticket.

Leslie is a Game of Thrones alumni, where she played Ygritte. Her character was Jon Snow's love interest and lasted for three seasons on the series. The two married in real life in 2018.

Harington also said he doesn't know if he is happy or sad about how Game of Thrones ends. He wants to see it actually play out on television to know if he is really satisfied at the conclusion of the HBO series.

The theories have been flying strong and fast since the first teaser trailer hit for the eighth season of Game of Thrones, with lots of hints thrown around that the end will not be a happy one for the characters that have lied, cheated and killed to get to their positions of power.

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The big questions surround the fate of fan-favorites like Jon Snow and Daenerys Targaryen. If Harington's wife was so angry after learning how it all ended, that might not bode well for members of Team Jon.

Game of Thrones returns for its final season on April 14, 2019. The HBO drama stars Kit Harington as Jon Snow, Emilia Clarke as Daenerys Targaryen, Peter Dinklage as Tyrion Lannister, Lena Headey as Cersei Lannister, and Nikolaj Coster-Waldau as Jaime Lannister.