Alfie Allen plays Theon Greyjoy in "Game of Thrones". - HBO

The cast of Game of Thrones in mourning. Andrew Dunbar, the understudy of Alfie Allen, the interpreter of Theon Greyjoy in "Game of Thrones, died on December 24 at the age of 30. The causes of death have not been made public. Andrew Dunbar was also one of the tour guides at the filming locations for the HBO cult series.

“I am extremely shocked and saddened to learn of his death. Losing a loved one so young, I can only imagine the ordeal that his family is going through. Rest in peace Andrew, "Alfie Allen said on Instagram, according to The Sun.

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To say we are shocked and saddened at the passing of Andrew Dunbar is an understatement. We have so many fond memories of the years Andrew worked with us. He was so versatile we could cast him in anything, he was such a talented performer he would always end up being featured, and he was so adored that he was always requested by productions again and again. He'll be remembered in his roles as a Stark and Theon Greyjoy's Double on Game of Thrones, a corrupt Police Officer on Line of Duty, the poor fella cornered by Colum on Derry Girls, and a Rebel on Krypton to name a few. But most of all he'll be remembered by his kind soul and infectious personality. Thank you for all you did for us Andrew. We will miss you dearly.

A post shared by TheExtrasDept (@theextrasdept) on Dec 27, 2019 at 6:02 am PST

"To say that we are shocked and saddened by the death of Andrew Dunbar is an understatement," wrote for his part The Extra Dept, the agency that had hired Andrew Dunbar. "He was so versatile that we could get him involved in any production, he was so talented that he always ended up being featured, and he was so loved that he was always in demand by productions over and over again Continues the publication, which recalls that the young man had also appeared in Line of Duty, Derry Girls and Krypton.

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