Alfie Allen is not easily pranked, something the “Game of Thrones” star proved in an anecdote he shared with James Corden on Tuesday’s edition of “The Late Late Show”.

Chatting with Corden about the HBO hit’s final season, the 32-year-old actor revealed that series creators D.B. Weiss and David Benioff tried to prank him with a fake script in the show’s second season — and it backfired.

“At the end of the season, there’s a — well, the script was given to me, and basically, I kind of give this rousing speech, if I may say so myself,” explained Allen, who played Theon Greyjoy on the show.

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“So at the end of this speech, Bran [Isaac Hempstead-Wright] sort of pops out from somewhere and stabs me in the chest and says, ‘This is my Winterfell, not yours,’” he continued, a twist on Theon pretending to murder Bran and brother Rickon (Art Parkinson).

Weiss and Benioff clearly expected that Allen would be upset that his character was being killed off, but he didn’t deliver the reaction they were expecting.

“And so I kind of just took it on the chin and got on with it, you know,” he said.

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As filming continued, the other actors — who were apparently in on the joke — realized that the prank really wasn’t working.

“I think about three weeks passed where I had kind of finished my shooting for that season, and people in the cast were kind of telling David and Dan — because they had given me this fake script with this kind of fake ending — that maybe you should tell him that it’s fake,” Allen continued.

“So they wrote a script, telling you that your character would die as a prank, and because you went, ‘Aw, okay,’ it sort of backfired,” clarified Corden.

“I guess so, yeah, a little bit,” Allen replied, admitting he was completely nonplussed by the possibility of Theon’s demise.

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“So yeah, people decided to tell them that maybe you should call him, ’cause he might be tearing his hair out,” he quipped, “but I wasn’t, I was sunbathing.”

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