BEST FICTIONAL...

[ScribesOfSparn]

OK, Best fictional movie about D&D players... GO:

 

[WayneLigon]

As far as I know, there's only the one: Mazes and Monsters. And soon: Dark Dungeons.
There are a bare handful where you see characters playing D&D or something like it; ET is probably the most famous.

 

[RangerWickett]

The Gamers.

The Gamers II.

I just saw Hercules, and it was pretty much a D&D adventuring party (and damned fun).

 

[Janx]

Knights of BadDonkeydom


Though it's mostly about LARPers, but is has Peter Dinklage in it.