Octavia Spencer, John Cena and More Join Robert Downey Jr. in 'The Voyage of Doctor Dolittle'

Octavia Spencer at 2018 Oscars
Frazer Harrison/Getty Images

Quack! Spencer will voice Dab-Dab the duck in the live action film.

The Voyage of Doctor Dolittle just got even more star-studded!

Octavia Spencer, Rami Malek, John Cena, Marion Cotillard and Kumail Nanjiani are among those who have been confirmed to join the voice cast of the upcoming film.

They join previously announced stars Emma Thompson, Tom Holland, Ralph Fiennes and Selena Gomez, who will voice a giraffe named Betsy.

Robert Downey Jr. will take on the title role of the eccentric doctor, who is able to communicate with animals. Like Downey, Antonio Banderas and Michael Sheen will also star in live-action roles in the upcoming film.

The story is based on the popular Doctor Dolittle children’s books by Hugh Lofting, which were previously brought to life on the big screen with the 1967 musical starring Rex Harrison, then again in both 1998 and 2001 with Eddie Murphy playing the titular role.

The film is scheduled to hit theaters in 2019.

See more below.

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