Scarlett Johansson and Oscar winner Lupita Nyong'o are in negotiations to join the voice cast of Warner Bros.' live-action/CGI hybrid The Jungle Book. The actress' join Idris Elba, who signed on back in March.

This adaptation of Rudyard Kipling's beloved novel follows Mowgli, who has not been cast yet, a young boy who is raised in the wilderness by a pack of wolves, a bear and a black panther. Scarlett Johansson is in early talks to voice Kaa, a python who eats other animals after hypnotizing them. This snake is the second villain next to the man-eating tiger Shere Khan (Idris Elba), who views Mowgli as a threat to his domain. Lupita Nyong'o is in final talks to voice Rakcha, a mother wolf who takes Mowgli in.

Jon Favreau is directing from an adapted screenplay by Justin Marks, with the director also producing alongside Brigham Taylor. It isn't known when production will begin, although the project has some competition with Disney's version of The Jungle Book, which has Andy Serkis attached to direct from a script by Steve Kloves (Harry Potter and the Deathly Hallows - Part 2). Rudyard Kipling's book is in the public domain, which allows both adaptations to move forward. It isn't known when shooting will begin on Warner Bros.' version of The Jungle Book, which has an October 9, 2015 release date in place.

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Scarlett Johansson currently stars in Captain America: The Winter Soldier and Under the Skin, which are both playing in theaters, and she recently started production on Avengers: Age of Ultron. Lupita Nyong'o is coming off her Best Supporting Actress Oscar win for 12 Years a Slave, and she also recently starred in Non-Stop.