List of films produced back-to-back

Sometimes, two or more films in a series are shot and produced "back-to-back", which means simultaneously or within a short space of time. This is usually done to eliminate the need to rebuild sets and re-hire actors for sequels, and maintain audience interest in the film series. Films produced this way usually have a well-planned pipeline, where the first film may be in post-production as the second is being shot.

While sometimes a trilogy such as "The Lord of the Rings" is shot with all three parts back-to-back, it is much more common for only two parts to be shot this way. Often, in a trilogy, the first film will be made on its own, and if it is a success, the remaining two parts will be produced back-to-back. This approach was pioneered by the second and third parts of the "Sleepaway Camp" trilogy, and has since been applied to the "Back to the Future" trilogy, "The Matrix" trilogy, and the "Pirates of the Caribbean" trilogy. "Back to the Future Part II", and later, "The Matrix Reloaded" both ended with the words "To Be Concluded", a variant on the traditional "To be continued", and a trailer for their respective upcoming sequels.

What follows is a list of films that have been produced this way:
* "The Three Musketeers" (1973) and "The Four Musketeers" (1974) (shot as one film as far as the actors knew)
* "Superman" (1978) and "Superman II" (1980)
* "Trail of the Pink Panther" (1982) and "Curse of the Pink Panther" (1983)
* ' (1988) and ' (1989)
* "King Solomon's Mines" (1985) and "Allan Quatermain and the Lost City of Gold" (1986)
* "Back to the Future Part II" (1989) and "Back to the Future Part III" (1990)
* "Critters 3" and "Critters 4" (both 1991)
* "Three Colors trilogy": ' (1993), ' (1994), and "" (1994).
* "Blue in the Face" (1995) was conceived and filmed completely ad libbed immediately following production of "Smoke" (1995).
* "The Lord of the Rings": ' (2001), ' (2002) and "" (2003)
* "The Matrix Reloaded" (2003) and "The Matrix Revolutions" (2003)
* "Kill Bill", Volume 1 (2003) and 2 (2004) (originally shot as one film; later edited into two separate films.)
*' and ' (2004) (the second film was a DTV effort assembled from deleted scenes and outtakes of the first).
* "" (2004) and "Ginger Snaps Back" (2005)
* ' (2006) and ' (2007)
* "Jackass Number Two" (2006) and "Jackass 2.5" (2007)
* "Flags of Our Fathers" (2006) and "Letters From Iwo Jima" (2006)
*"The Argentine" and "Guerrilla".

Though not shot entirely back-to-back, the final scene of ' was shot in Tunisia during the production of ' in order to avoid another trip to Tunisia for a single scene.