‘Harry Potter’ star joins ‘Game Of Thrones’ cast for season seven

Actor will play a 'significant' role in the next season of the HBO show

Oscar-winning actor Jim Broadbent will play a “significant” character in Game Of Thrones season 7, reports claim.

The seventh series will be the penultimate instalment of the show and will debut on HBO in summer 2017. The eighth and final season is expected to follow in 2018.

Entertainment Weekly now reports that British actor Broadbent – who appeared as Horace Slughorn in two Potter films as well as starring in Moulin Rouge and Bridget Jones’s Diary – has signed on for the next season of the show, although further details of the role are not yet known.

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Meanwhile, GoT star Kit Harington has warned fans that the show gets “very dark before it gets better” when speaking about what’s to come for his character Jon Snow and the rest of the cast.

“It’s important to stress at this point that I haven’t had any scripts, so this is all guess work for me,” he said. “I think it’s going to get very bleak before if there is a happy ending.

“If there’s any sort of win or heroic moment for Jon and everyone else. I think it’s going to get very dark before it gets better. I think what we might see this season is those White Walkers and that Army of the Dead really come into force. So that’s going to be exciting to see.”

He added that he didn’t know what “winter is finally here” meant in relation to the storyline “I think with the whole “winter is finally here” business, it means everyone is going to have a really bad time,” he said.