Cecil Hepworth is one of the unsung heroes of early cinema. The son of a magic-lantern showman and novelist, Hepworth was one of the first producers/directors to realize the potential of making full-length “feature films” (his version of David Copperfield in 1913 ran for 67 minutes) and the selling power of star actors (and animals—most notably his pet dog in Rescued by Rover in 1905)
Source: Watch the very first film version of ‘Alice in Wonderland' from 1903 | Dangerous Minds