First Men in the Moon (also known H.G. Wells' First Men in the Moon) is a 1964 British science fiction film, produced by Charles H. Schneer, directed by Nathan Juran, and starring Edward Judd, Martha Hyer and Lionel Jeffries. The film, distributed by Columbia Pictures, is an adaptation by screenwriter Nigel Kneale of H. G. Wells' 1901 novel The First Men in the Moon.

Ray Harryhausen provided the stop-motion animation effects, which include the Selenites, giant caterpillar-like "Moon Cows" and the large-brained Grand Lunar.