A minute-long preview for the last two episodes of Game Of Thrones' eighth season was allegedly leaked on Monday, leaving fans livid over the show's potential ending.

According to The Sun, the footage is believed to show major spoilers for the battle of King's Landing, as well as how the show will end in episode six.

Viewers, who had seen the potential spoilers on Twitter, were furious at the prospect of what the leak could mean, with one even saying it meant the show had "the worst ending in TV history".

After apparently reading spoilers for the last two episodes of the series, some fans took to the social media platform to vent their frustrations about what could come.

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One user wrote: "I just read the summary leaks of episode 5 and 6 of Game Of Thrones. If this summary is true D&D really f***** up the best show in TV history for shock value (sic)."

While another added: "I've seen the leaked episode 5 and it's the worst ending in TV history, if people don't believe me go to Reddit and Twitter and type Game Of Thrones leaks and you'll see and they posted leaks 5 days ago and everything on the leaked script came true in Episode 4."

Another user went on to say: "If you thought this episode was disappointing, if the leaks for episode 5 & 6 prove true as well (which they probably will as they were spot on for season 8 thus far) you haven't seen nothing yet."

One went on to say: "I just read all the leaks for Game of Thrones. I don't want the ending anymore. Cancel the show... if all of that is true... people are gonna have a bad taste in their mouth after putting so much of their time into this show."

The HBO fantasy's fourth episode saw the show set the stage for the episode's next instalment as Daenerys, her army of Unsullied and Dothraki warriors, Tyrion and Varys arrived outside of King's Landing.

Hoping to convince Cersei to let Daenerys' right-hand woman Missandei go, and appeal to her good nature to choose a peaceful surrender over a bloody battle, they got an unwelcome surprise when the Queen of Westeros chose to kill her instead.

In mourning over the loss of her most trusted ally, and also the death of Jorah Mormont in episode three, it seems like Daenerys will be out for blood and exact her revenge on Cersei no matter the cost in the penultimate episode.