Starring the charismatic Robert Downey Jr. as the titular character, Dolittle marries a stellar voice cast with its live-action allure. Helmed by Stephen Gaghan and drawing inspiration from Hugh Lofting's classic 1922 children's tale, The Voyages of Doctor Dolittle, this live-action/CGI spectacle marks Downey Jr.'s much-anticipated return to the silver screen following his epic swan song in the previous year's cinematic titan, Avengers: Endgame.
https://screenrant.com/dolittle-movie-voice-cast-character-guide/