* AFIS100YearsSeries:
** AFIS100Years100Laughs: #42
** AFIS10Top10:
*** #10, Fantasy
* AvoidTheDreadedGRating: Subverted. You'd be shocked to find this movie is rated PG despite one usage of the word "fuck".
* {{Defictionalization}}: That computer game Josh plays? [[http://www.bomtoons.com/biggame.html Someone went ahead and made it for real]].
* DeletedRole: Frances Fisher was cast as Billy's mother but all of her scenes were deleted. Her scenes were reintroduced on the Extended Edition DVD.
* TheOtherMarty: Invoked during filming. Reportedly, Penny Marshall had David Moscow perform scenes of the grown-up Josh to help Creator/TomHanks get a handle on a how a kid would behave in an adult setting.
* TheRedStapler: Since its first release, many people have stopped by the FAO Schwartz on Fifth Avenue to play the floor keyboard. The demand for smaller floor pianos such as [[https://www.youtube.com/watch?v=VWUzBPN4QWQ "Foot Notes"]] also dramatically rose in the months following ''Big''[='=]s release, especially during the Christmas season after it came out.
* ThrowItIn:
** The "Big rap" sung by Josh and Billy is one Creator/TomHanks' son had learned while at summer camp.
** The scene where Josh and Billy shoot Silly String at each other was derived from Hanks, Rushton, and Moscow being left in a room filled with toys.
** At the fancy party with baby ears of corn, Josh' eating the tiny ear as one would a normal one was put in by Hanks.
* TomHanksSyndrome: This movie marks Creator/TomHanks' transition from a comedic actor to a dramatic actor, even though the movie was part comedy, part drama.
* WhatCouldHaveBeen:
** Creator/WarrenBeatty[[note]] His asking price was too high[[/note]], Creator/JeffBridges, Creator/AlbertBrooks[[note]] He turned it down, as he didn't want to play a kid at the time[[/note]], Creator/GaryBusey, Creator/KevinCostner, Creator/RobertDeNiro, Creator/ClintEastwood, Creator/HarrisonFord, Steve Guttenberg, Creator/MichaelKeaton, Creator/BillMurray, Creator/DennisQuaid[[note]] He turned it down in favour of ''Everybody's All-American''[[/note]], Creator/SeanPenn, Judge Reinhold, Creator/JohnTravolta[[note]]He auditioned, but was deemed box-office poison [[/note]] and Creator/RobinWilliams were all considered for the role of adult Josh.
** Debra Winger was offered the role of Susan, but she turned it down because she was pregnant at the time. She even recommended Elizabeth Perkins for the part.
** Creator/StevenSpielberg considered directing the film (his sister co-wrote it, after all) but declined as his son had been born and felt he should be closer to him. Creator/JohnLandis was offered the job, but he did ''Film/ComingToAmerica'' instead. Creator/RonHoward and Creator/SydneyPollack also turned down the directorial job.