The Cave Girl is a 1921 American silent drama film directed by Joseph J. Franz and featuring Teddie Gerard, Charles Meredith, Lillian Tucker and Boris Karloff in an early film role. The source for the William Parker screenplay was the stage play of the same name by George Middleton and Guy Bolton. The film's tagline was "A Romance of Silent Trails and Rushing Waters... A Drama of Youth Gone Wild... Enacted in the Yosemite Valley in the Middle of Winter.". The film is presumed lost.

William Henry Pratt, known professionally as Boris Karloff and occasionally billed as Karloff the Uncanny, was an English actor. His portrayal of Frankenstein's monster in the horror film Frankenstein (1931) established him as a horror icon, and he reprised the role for the sequels Bride of Frankenstein (1935) and Son of Frankenstein (1939). He also appeared as Imhotep in The Mummy (1932), and voiced the Grinch in, as well as narrating, the animated television special of Dr. Seuss' How the Grinch Stole Christmas! (1966), which won him a Grammy Award.