Sigourney Weaver was originally cast in the film, but had to drop out due to a conflicting schedule.
The asymmetrical-eyed costume for the March Hare scared Tina Majorino. Director Nick Willing thought this a success, since he had wanted the March Hare to be creepy.
Martin Short's head was digitally enlarged to three times its normal size, so to better replicate the Mad Hatter in the Tennil illustrations.