George R. R. Martin confirmed there will be changes and additions to the ending of his A Song of Ice and Fire series when compared to HBO’s Game of Thrones.
In a piece by Rolling Stone that focuses on GoT actresses Maisie Williams and Sophie Turner, Martin spoke about how the show’s creators, David Benioff and D. B. Weiss, had to make their own way with the story after the past couple of seasons began outpacing his writing.
“I’ve been so slow with these books,” said Martin. “The major points of the ending will be things I told them five or six years ago. But there may also be changes, and there’ll be a lot added.”
Source: IGN.com George R. R. Martin on Game of Thrones Book/Show Ending Differences