During filming, Kenny Everett would often forget that his character walks with a limp, or limp with the wrong leg. Director Ray Cameron eventually had to stick signs up on the set that said 'Limp!' and had a clapper boy charged with reminding Kenny to limp before each scene.
When Michael McIntyre (son of director Ray Cameron) met Billy Connolly (husband of Pamela Stephenson), Michael brought up this film. To which Billy simply responded "Pamela's been in a lot of shit movies."
International star Vincent Price was visually emphasized on the American home video front cover sleeves in the USA due to British comedian Kenny Everett not being very well known outside of England and the UK.
Then actress Pamela Stephenson portrayed a character called Doctor Barbara Coyle. In real life, Stephenson later became an academic and garnered a Doctor in Psychology qualification receiving her PhD in 1996. She also previously had starred in the Australian comedy film 'Doctors and Nurses' (1981).
Michael McIntyre: Uncredited, the then about eight year old son of the film's director Ray Cameron, as the voice of E.T. He later when grown up became a comedian in England. This voice cameo appearance was first publicly revealed in his autobiography ''Life & Laughing: My Story'' (2010) which was about twenty-six years after the movie had first come out.