While the grown gorillas in 1988's Gorillas in the Mist were often people in suits, the baby gorillas who interacted with humans were real monkeys though they weren't gorillas, they were chimpanzees who were made up in black-face and given peaked fur hats to more closely resemble gorillas. This is because the use of actual baby gorillas would have put the filmmakers in serious danger from the adult gorillas. Never mess with a someone's kids! Stay tuned!
Ripley, what the hell are you doing?