Game of Thrones stars are set to be offered huge new deals – to return for a big-budget movie sequel.

Studio bosses at Warner Bros have finally given the go-ahead a film that will pick up where the dungeons-and-dragons fantasy drama ended on HBO more than five years ago.

And they are aiming to reunite senior cast members whose characters were still standing when the epic show wrapped its blood-spattered eight-year, according to a top production executive.

These include Kit Harrington, whose…