The fight between the Jabberwocky and the Black Knight was choreographed differently than what is shown in this movie. When Peter Salmon slipped and fell, writer and director Terry Gilliam decided it looked so natural that he edited the fight sequence to include the fall.

On the DVD commentary, Terry Gilliam said the budget was so small they could only afford one corridor. Many scenes were shot in a single take because he didn't have enough time or money for multiple takes.

The monster costume was designed so that Peter Salmon had to wear it backwards, to make the Jabberwocky's leg movements more bird-like.

In some countries, this movie was promoted and released as "Monty Python's Jabberwocky", against the wishes of writer and director Terry Gilliam. After threats of legal action, the Python reference was removed from all subsequent re-issues.

One scene in the script called for the 1st Merchant to pick his nose. Peter Cellier refused, saying he would rather be naked.

Made on a modest budget of £500,000, this was filmed on the crumbling sets of "Oliver", and re-used costumes from "Alfred the Great", according to Philip Kemp in Sight & Sound Magazine.

Actors and actresses who auditioned for this movie were asked if they wore dentures.

This movie underwent a restoration by the BFI National Archive and The Film Foundation, funded by the George Lucas Family Foundation.

As the King enters the hall, one of the accomplishments announced is that he conquered Freedonia, the country run by Groucho Marx in Duck Soup (1933).

The original Jabberwocky costume from this movie was displayed in "The London Dungeon" on Tooley Street, London Bridge, soon after the release of the movie.

Though not a Monty Python film, contains a number of apparent subtle "nods and winks" to "Monty Python and the Holy Grail". Michael Palin's character, for example, is named Dennis; he also played a character named Dennis in "Grail". Also, in most scenes, the king appears to be holding the Holy Hand Grenade of Antioch that is used in "Grail" to slay the Killer Rabbit.

Terry Bedford, the original director of photography, was fired because of creative differences. However, according to Sir Michael Palin's diaries, he was re-instated shortly afterwards.

Dudley Moore was first cast as Man with Rock.

Two castles in Wales were used for King Bruno's castle.

John Cleese and Iain Cuthbertson turned down roles in this movie.

Annette Badland gained weight for her role as Griselda Fishfinger.

This movie is part of the Criterion Collection, spine #903.

Final theatrical movie of Harold Goodwin (1st Peasant). He spent the rest of his career in television.

The sequence in the armory was done in a single day.

Third theatrical movie of Sir Michael Palin (Dennis Cooper). His first two were And Now for Something Completely Different (1971) and Monty Python and the Holy Grail (1975).

Producer Sanford Lieberson originally wanted Michael Crawford for the role of Dennis Cooper.

Final film of Anita Sharp-Bolste.

The death of Cooper's father was inspired by writer and director Terry Gilliam's friend from the 1960s who was a folk singer and whose father had died. On his death bed, he was raving and told her how much he had hated her and completely denounced her as his daughter. Gilliam was obsessed with this story because of its "unbearably cruel" nature.