While I 愛 インターネット・ムービー・データベース(IMDb) for a quick reference, it is not always the best resource to see who is playing who in a movie, especially when the film is shrouded in secrecy. The people who are making The Host are not really forthcoming about a full cast list.
The Host インターネット・ムービー・データベース(IMDb) page has been updated to include Marcus Lyle Brown as Healer Fords Deep Waters (they call him ‘Healer Fords’) and a new character (who was not in the books) named Charles to be played によって Phil Austin.