The actress that plays Nymeria Sand in "Game of Thrones" stars with Kristen Stewart and T.J. Miller in an upcoming adventure-thriller film directed by who? 
Underwater (film):  The film is produced by Chernin Entertainment for 20th Century Fox and stars Kristen Stewart, T.J. Miller, Jessica Henwick, Mamoudou Athie, Vincent Cassel and John Gallagher Jr..
i don't know