The campaign is aimed at advertising the seventh season of the series, which starts on 16 July.
The white walkers, characters from the popular series Game of thrones, marched through the streets of London, Recalling that the new season soon.
Characters walked across Tower bridge, took pictures outside Buckingham Palace and was visited by Hadrian, who inspired the Creator of the novel a Song of ice and fire by George Martin the Wall.
The first series of season 7 will be released July 16 on HBO.
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