Actor Allusion: Taken almost to Recursive Reality levels. Steve Coogan, who played Tony Wilson, based his comedy character Alan Partridge partly on Tony Wilson, and there are notable similarities between how the characters are presented.
Hey, It's That Guy!: Nearly every big British actor and comedian of 2002 is in this movie. Just check out the cast list on IMDb.
In a similar vein, there's also a lot of cameos from real-life figures in the Madchester / Hacienda scene.
In particular, the gutter philosopher claiming to be Boethius may have actually been there just to inspire Tony Wilson. It wouldn't be the Doctor's strangest mission.
The actor playing Martin Hannett would go on to have an illustrious career playing Serkis Folk.
Production Posse: Steve Coogan would go on (as of 2015) to appear in four more Michael Winterbottom films, Tristram Shandy, The Trip, The Look Of Love, and The Trip To Italy. Shirley Henderson (who plays Tony Wilson's wife) had appreared previously in Wonderland and would later appear in Shandy, Everyday, and The Look Of Love.
Alternative Title(s):Twenty Four Hour Party People Film