Bill Hader may be shifting from the dark and gritty world of HBO's Barry to the whimsical tales of Dr. Seuss. According to Jeff Sneider's The InSneider newsletter, the Primetime Emmy-winning triple-threat has signed on to voice The Cat in the Hat Warner Bros. Pictures Animation's adaptation of the classic children's book. The upcoming CG-animated movie was first annoucned years ago in a pact between Warner Bros. and the Seuss Estate, though plans were delayed by the pandemic. Hader is the first cast member to become attached to the project, and it marks an interesting role for him since he actually played The Cat in the Hat during a sketch on Saturday Night Live when he was still a cast member.