The names no one knows, but the ones who made the movie what it is. I couldn't imagine Baloo with a different voice, could you? Or any of the characters for that matter.

Phil Harris ... Baloo
Sebastian Cabot ... Bagheera

Louis Prima ... King Louie
George Sanders ... Shere Khan
Sterling Holloway ... Kaa
J. Pat O'Malley ... Colonel Hathi / Buzzie
Bruce Reitherman ... Mowgli
Verna Felton ... Winifred

Clint Howard ... Junior
Chad Stuart ... Flaps
Lord Tim Hudson ... Dizzy
John Abbott ... Akela the Wolf
Ben Wright ... Rama
Darleen Carr ... Shanti