Donald Michael "Donnie" Thornberry is a feral boy who (as revealed in the 2001 4-part TV movie, The Origin of Donnie) was raised by orangutans after his biological parents, a pair of naturalists, were killed by poachers until the orangutan mother gives him up to the Thornberry family. He babbles wildly and makes animal sounds (but nothing Eliza can understand), occasionally spouting blurbs of English.
Donald Michael Thornberry has been suggested to play 4 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.