Untamed Heart agent, MGM had greenlighted the project. Originally, the film was titled "The Baboon Heart" in honor of an infant named Baby Fae (born 14 October 1984) who received a cross-species heart transplant from a baboon to fix a congenital heart defect. Initially, Bill had not considered Christian Slater for the role of Adam, “but then it was just the obvious choice." For the role of Caroline, Bill remembered auditioning Marisa Tomei for his earlier film, "Five Corners". While she had been too young for that role, after her success with "My Cousin Vinny" he felt she was right for the
Kinda baboon about the size of adult females of other baboon species. The Kinda baboon is also characterized by its short face (relating to its small size), pink circles around its eyes, and its infants are frequently born with white instead of black hair. Baboons in between the size of the Kinda baboon and the yellow baboon are present in northeastern Zambia, and possibly in northern Malawi and southwestern Tanzania as well. Such a broad area of intergradation has been taken as evidence of substantial genetic exchange between the two taxa. The Kinda baboon appears to live in large (perhaps over 100