* Bill Travers as George Adamson
* Virgina McKenna as Joy Adamson
* Peter Lukoye as Musa
* Nigel Davenport as "Pops"
* Geoffrey Keen as Baines
* Roderick Lovell as Jock
* John Leyton as Tony
* Paul Stassino as Charlie
* Walter Gotell as The Chief
The film primarily features the real-life couple, George and Joy Adamson, who were played by Bill Travers and Virginia McKenna. It's important to note that while the film features the work of George and Joy Adamson in Kenya, the lions Elsa, and the real-life events of Elsa's rehabilitation, the story itself is a dramatized version of their experiences.