Trivia: The film's script originally contained a mention of Alexander Dane having been knighted by Queen Elizabeth. Alan Rickman asked that this be changed because he believed it was inconsistent with the character, and all mentions of the knighting were removed; however, the character remains listed as "Sir Alexander Dane" in the credits
Trivia: Apparently Sigourney asked and was allowed to keep the devices used to pump up her breasts so much. Some sort of silicon pad thing, I think.
Trivia: Rumors of a potential sequel or follow-up were fairly consistent starting just after the film's initial release, especially as many of the cast and crew enjoyed working on this film and highly enjoyed the final film. In 2015, website Amazon was reportedly actively developing a web-series follow-up that was intended to feature the entire original cast. However, production on the series was placed on an indefinite hold in 2016 following the tragic passing of co-star Alan Rickman and scheduling conflicts with Tim Allen's television series "Last Man Standing."
Trivia: The film was originally much more "mature" and contained more profanity, violence and adult-oriented jokes. The first cut of the film submitted to the MPAA even received an R-rating according to one of the producers and co-star Sigourney Weaver, due to some of its content. It was then decided that the film should be cut for content down to a more family-friendly PG rating. It's obvious when watching the film that some of the dialog had been overdubbed to remove profanity, and the film's official shooting script was also more profane, containing several instances of strong language and some crude humor. (Such as a scene where a fan presents Gwen with a fake/shopped "nude" photograph of her to autograph... which she does).
Trivia: Tim Allen wasn't the original choice for Jason Nesmith. The producers and original director wanted Kevin Kline to star in the film as Jason, but he turned it down. Reportedly, Alec Baldwin loved the script and campaigned aggressively for the role and was also considered, but ultimately wasn't chosen.TedStixon
Trivia: When the captain and Gwen enter the room to disengage the core overload Gwen's shirt is slightly open, then a few seconds later it is ripped down so you can see her bra. In a deleted scene she was showing her boobs to the two bad guys.
Trivia: While "Galaxy Quest" has, over the years, achieved cult status, and some commentators have even claimed it is better than Star Trek, the story idea for GQ seems to have originated in Star Trek fan fiction of the mid-1970s. In an anthology of fan fiction commercially released as "Star Trek: The New Voyages" (edited by Sondra Marshak and Myrna Culbreath), there is one short story titled "Visit to a Weird Planet Revisited" by Ruth Berman in which the principle actors of the original Star Trek series (William Shatner, Leonard Nimoy and DeForest Kelly) are somehow, inexplicably, transported from the film studio to the REAL starship Enterprise, where they pretend to be real Federation officers and must deal with a Klingon incursion. It's the identical main story of "Galaxy Quest," except Star Trek fans invented it more than 20 years earlier. Http://members.optusnet.com.au/virgothomas/space/trek/weirdplanet.html.Charles Austin Miller
Trivia: The Thermians' unique way of speaking was reportedly just improvised on-set by co-star Encrico Colantoni. Everyone loved it so much, it was made a part of the film, and all of the Thermian-actors began adopting similar quirky voices.