* ActorAllusion:
** Nathan Lane is openly gay.[[note]]Though he wasn't out at the time the movie was released.[[/note]]
*** He also plays a guy who [[Disney/TheLionKing dresses in drag (he doesn't do the hula, though)]].
** Creator/RobinWilliams dips into his trademark Creator/JohnWayne impression at one point.
** The dancer whom Armand instructs to do an "eccentric celebration of dance" is told to do, among others, "Madonna! Madonna! Madonna!" The actor playing him was, in fact, a former backup dancer for Music/{{Madonna}}.
* DawsonCasting:
** 32-year-old Creator/CalistaFlockhart unconvincingly plays a 19-year-old. (Being so waifish, she could pass as a senior or graduate student, but come on.)
** Dan Futterman was 27, playing the 20 year old Val.
* HarpoDoesSomethingFunny: Due to the nature of the story, Mike Nichols made Nathan Lane and Creator/RobinWilliams ''promise'' to do one take exactly as scripted before they could go wild in retakes. This is bound to happen.
* PlayingAgainstType: One of Creator/RobinWilliams' few comedic roles as the (no pun intended) StraightMan. In fact, he was originally cast as Albert before he asked to switch roles with Nathan Lane in fear of TypeCasting.
* TechnologyMarchesOn: It's a fairly major plot point that while a character can dial out from her car phone, she can't ''receive'' calls on it. Thus while she can call out for her messages, and then call the protagonists, they can't call her back to say that plans have changed yet again.
* ThrowItIn
** Reportedly, this happened between Nathan Lane and Robin Williams quite a bit. They did it so often that they were forced to promise that they would do one take exactly as the script said before they were allowed to ad-lib anymore.
** Robin Williams' pratfall in the kitchen was entirely accidental, but the other actors [[{{Corpsing}} held it together]] enough to use the take.
** Director Mike Nichols added "...but you keep it all inside" to the end of Armand's "eccentric celebration of dance."
* WhatCouldHaveBeen: Before he had to drop out due to scheduling conflicts, Creator/SteveMartin was set to play Armand, with Creator/RobinWilliams as Albert.

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