Leading lady Victoria Principal's second feature film. She later said that this movie is "worse than terrible", and that its failure hurt her feature film career. Eventually, she moved to television and became a major star on the nighttime soap opera Dallas (1978).
The Naked Ape has been resurfaced at the widely know public after Italian singer and composer Francesco Gabbani cited the book and movie in his lyrics for the hit song Occidentali's Karma. Gabbani even meet Desmond Morris, the author of the book.
John Hillerman also appeared in the hit 'Paper Moon' (dir. Peter Bogdanovich) in the same year, 1973.
One of the earliest known visions of a Gay Pride parade in a feature film.
The sound designer on this film, Les Fresholtz, was Oscar-nominated in the same year (for his work on 'Paper Moon') and would go on to win two Oscars from 10 nominations.