Ed Harris may have been clueless about that major twist during Westworld's first season, but fans weren't so easily fooled.

Rumours that William (Jimmi Simmons) was actually a younger Man in Black (Ed Harris) circulated on fan websites weeks before the twist aired on screens, and now it seems the show's über-fans are one step ahead yet again - much to the dismay of the show's creators.

Speaking at Paleyfest over the weekend (via Deadline), Westworld creator and showrunner Jonathan Nolan confirmed he's currently writing the show's second season and added that he's "terribly excited" about it too.

But during the Q&A panel, Nolan also revealed that Reddit users had "already figured out" a major twist for the show's second season, forcing the writers to change what they had planned.

HBO

"Reddit has already figured out the third episode twist," said Nolan. "So, we're changing that right now.

"It's annoying sometimes when people guess the twists and then blog about it, but the engagement is gratifying, on one level, because if someone guesses your twist, it means you've done an adequate job [of structuring the series]."

While Nolan was the first to applaud the fans' pretty spot-on theories, he did ask people to stop guessing twists so Westworld can get back on screens as soon as possible.

"You can't complain when people are that engaged," he added. "It's very gratifying — but stop doing it, please."

Westworld won't return until 2018, with one of the series' stars Luke Hemsworth naming the scripts as the main reason for the series' delayed return.

HBO

There were rumours the second season would be set in a Samurai Park, after the location was alluded to during the season finale but it was the Man in Black himself who shut that rumour down by admitting he wouldn't be jumping into a Samurai suit anytime soon.

"It's 'Man in Black', not 'Man in a Samurai suit'," Harris joked during the panel. "Samurais don't wear hats."

Westworld will return to HBO in the US and Sky Atlantic in the UK.

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