Much of the language that the aliens speak is actually just the dialogue being read backwards (this is particularly obvious with Wiploc during his conversations with Zeebo). For example, 'from' becomes "morf" and 'females' becomes "selamef".
Production was halted during a scene where a woman backs into a cactus, because the director didn't think the cactus needles were reading on film. The needles were ultimately coated with clear nail polish.
Two of the cars from Death Race 2000 (1975) appear in this film. Calamity Jane's car is visible at the gas station, and Frankenstein's car may be seen on the road while Wiploc and Zeebo characters are driving backwards.
Nearly 27 years since the release of the film, singer Britney Spears and rapper Iggy Azalea put out a song named "Pretty Girls" basing the concept of the video in the movie and its main star Geena Davis.
This movie was the final appearance of Robby the Robot in film for quite some time. Fifteen years later, the costume returned in Looney Tunes: Back in Action (2003). Robby was absent from just about everywhere else, too, making only a brief appearance in the early 1990s on Totally Hidden Videos before virtually disappearing until 2003.
The film was originally slated to be released by Warner Bros. in 1986, but the studio turned it down after Julian Temple's previous film Absolute Beginners (1986) proved less than stellar at the box office. De Laurentiis Entertainment Group (DEG) eventually agreed to distribute it, but the film would eventually be acquired by Vestron Pictures after DEG filed for bankruptcy after filming was complete. Prior to Vestron picking up the film for distribution, other studios including New World Pictures, Nelson Entertainment, MGM, and 20th Century Fox expressed interest in acquiring the film.
When Candy and Valerie cruised down the boulevard with the aliens, Candy performed the song "I Like 'em Big and Stupid" in the back of the convertible. The sequence was cut (but later unearthed as a DVD extra) and a different recording of the song was dubbed into the sound mix for the club scene. This deleted scene formed the basis of the Britney Spears music video "Pretty Girls," which was acknowledged as "inspired by" the film.
New leading man Jeff Goldblum, had a UK Premiere [May 1989] led cast to PR ahead of autumn release in UK of 'Earth Girls are Easy', enticing support of the most densely packed (UK non-Award), celebrity event 'Save the Rose Theatre' campaigns, public PR day, May 1989. The variety of *networking done believed to have triggered several successful castings in post 1990 roles. [See also 'Judd Hirsh', Depeche Mode ].