Talk:No Game, No Life -Zero-/@comment-26086835-20160718215134/@comment-26947994-20160720040713

They announced it on their twitter page.

https://twitter.com/ngnl_anime/status/754620953707950080

...But it's in Japanese, so I suppose you won't be able to read it...

Here's a news article on it:

http://www.animenewsnetwork.com/news/2016-07-17/no-game-no-life-fantasy-light-novels-get-anime-film/.104415