Warner Bros has hired screenwriter Adam Sachs to rewrite Aardvark Art's Ark, the animated family-spec for producer Donald De Line and original writer-star Casey Affleck.

According to The Hollywood Reporter, Sachs will rework the story of a group of animals who are stranded when they are not chosen to go on Noah's ark.

"He had a really good energy," said Affleck, who will stay involved with the script's development despite his busy acting schedule. "It's hard to tell what someone's going to write based on how they describe a script or story or a character. That said, here was a guy who seemed to really like the things that I liked about it, and he thought the same things were funny that I thought were funny about the story and about the characters."

No production date has been set.