Star Begotten is a 1937 novel by H. G. Wells. It tells the story of a series of men who conjecture upon the possibility of the human race being altered, by genetic modification, by Martians to replace their own dying planet.

The book readdresses the idea of the existence of Martians, which Wells had written about in The War of the Worlds (1898). The dialogue of Star Begotten makes brief references to Wells's earlier novel, referring to it as having been written by "Jules Verne, Conan Doyle, one of those fellows".