The live-action musical comedy recently confirmed that Michael Sheen and Antonio Banderas would have physical roles in The Voyage of Doctor Dolittle opposite Downey's titular character, in addition to news that animal voices would be provided by the likes of Emma Thompson and Spider-Man star Tom Holland.
As it turns out, RDJ was just getting warmed up. On Tuesday (March 27), he unveiled the full voice lineup on Twitter, including John Cena as a polar bear named Yoshi and Octavia Spencer as a duck called Dab Dab.
Others joining the lineup include Rami Malek as Chee-Chee the gorilla, Selena Gomez as Betsy the giraffe, Academy Award winner Marion Cotillard as Tutu the Fox and James Bond star Ralph Fiennes as Barry the Tiger. Check out the full voice cast below:
The Voyage of Doctor Dolittle is a reinvention of Hugh Lofting's beloved children's stories about a physician who suddenly develops the ability to communicate with animals. The first feature adaptation of Doctor Dolittle starred Rex Harrison in 1967, with Eddie Murphy taking over the role in 1998.
Oscar-winning Traffic and Syriana filmmaker Stephen Gaghan is on board as both writer and director of the kid-oriented comedy.
The Voyage of Doctor Dolittle is currently scheduled to open in the US on April 12, 2019.