 | Virginia McKenna als Joy Adamson |
 | Bill Travers als George Adamson |
 | Geoffrey Keen als Kendall |
 | Peter Lukoye als Nuru |
| Omar Chambati als Makkede |
| Bill Godden als Sam |
| Robert S. Young als James |
| Bryan Epsom als Baker |
| Geoffrey Best als Watson |
| Robert Cheetham als Ken |
| Surya Patel als Doctor |
| Elsa als Lion Cub/Lioness (uncredited) |
| Pati als Rock Hyrax (uncredited) |
| Lester Cole | Screenplay |
| Paul B. Radin | Producer |
| Sam Jaffe | Producer |
| Don Deacon | Editor |
| James Hill | Director |
| Kenneth Talbot | Director of Photography |
| Joy Adamson | Book |
| Carl Foreman | Executive Producer |
| John Barry | Original Music Composer |
| Sidney G. Barnsby | Production Supervisor |
| L. C. Rudkin | Production Manager |
| William P. Cartlidge | Assistant Director |
| Gavrik Losey | Assistant Director |
| Don Black | Lyricist |
| John Barry | Songs |
| Tom McGowan | Director |
| Chris Greenham | Sound Editor |
| Claude Hitchcock | Sound Recordist |
| Bob Jones | Sound Recordist |
| Richard Best Jr. | Assistant Sound Editor |
| John D. Hall | Boom Operator |
