Sophie Turner wrote her Game of Thrones co-star Kit Harrington a goodbye letter when she thought his character Jon Snow had been killed off.
The 20-year-old actress has revealed that the details of every character's death on the HBO fantasy TV series - based on George R. R. Martin's novels of the same name - is kept top secret from the rest of the cast, with only those due to be murdered being told of their exit.
So when Kit, 29, confessed to her that he was facing being killed, Sophie - who plays Sansa Stark - decided to pen him a message telling him how much she had loved working with him on the programme.
And when Kit made his surprise return to set he couldn't help but tease her about her kind written words.
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During an interview on UK TV show This Morning, she revealed: "It was kept from me. Kit told me in the fifth season that he was going, that was it, and so I wrote him a really long heartfelt letter about how much I was going to miss him, how much I loved working with him. And then he came back the next season and was like, 'Your letter is so funny I've still got it.' He does it just to take the mickey out of me now. He shows it to people. I was really gullible. Everyone dies (in the show) so I was just like, 'Another one bites the dust.' "
Sophie - who can currently be seen on the big screen as Jean Grey in X-Men: Apocalypse - is relieved that the secret of Jon Snow's survival is now out because she always gets nervous about spilling secrets from Game of Thrones.
She said: "Most of the time people keep it (who's leaving) a secret. There's a lot of secrets to keep but luckily the Jon Snow secret is out now."
Snow was thought to be dead after he was repeatedly stabbed in the courtyard of the castle in the Mutiny at Castle Black and left to bleed out in the frost, however, a day later he is brought back to life by Melisandre (Carice van Houten).
- Bang! Showbiz