Here's one of the songs in "Rock and Rule"..."My name is Mok." He plays the villain of course.
http://download.yousendit.com/BF6749C8420000C7
Quality isn't the best, but the song is very funny. "I'm the best thing since World War III....Girls?" Lou sings.

I read, but was somehow overwhelmed! Anyway, it happens to me all the time too. Thin consolation I know. :o

Twisted Sister in Pee Wee's Big Adventure...
Henry Rollins and Marilyn Manson in Lost Highway

Sting doing a cameo in "Plenty" with Meryl Streep. And good night.

pearl jam -singles
johnny cash in a columbo episode
david bowie in the illusionist and labrnyth

not that anyone would read it and i hope someone else posts it right below me but:

neil diamond in the jazz singer (remake)
neil diamond in saving silverman a.k.a. evil woman
ronnie james dio in that tenacious d movie
ozzy in little nicky

thanks, musicfallinglikesnow!

flea in suburbia and my own private idaho

Gasp...
Toko's already mentioned the schizoid Performance, with Mick Jagger and James Fox (who's not a musician but a great actor in that film)
Gasp...
Terminal Pharmacy's already mentioned Nick Cave's prison movie Ghosts of the Civil Dead, which was rather good, quoted as one of the best Australian pictures of its decade. Cave plays a mad convict placed there to create tension in the most dangerous prisoners area. A beautiful film.

Beach Boys drummer Dennis Wilson was James Taylor's mechanic in Two Lane Blacktop
Cris Campion, who played oppostite Walter Matthau in Polanski's Pirates was a drummer in a French boys band
So was Mark Wahlberg if I'm correct

Rufus Thomas in Cookie's Fortune
Lyle Lovett in Cookie's Fortune, and the Player, Short cuts
Edson, John Lurie, Arto Lindsay, Ann Magnuson and others in Desperately Seeking Susan (Magnuson would play in the following so-so Susan Seidelman picture with John Malkovich)

Ric Ocasek (painting the light from a bulb), Debbie Harry in Hairspray
Ric Ocasek and Neil young (truck driver) in Alan Rudolph's Made in Heaven
Neil Young would play in another Rudolph film, Love at Large, that isn't great
Rudolph directed a picture I've never seen called Roadie, which had Alice Cooper, Meat Loaf and Harry-Stein-Burke-Destri-Infante-Harrison

Boss Hog plays in Joe's Apartment cockroach picture
The Woodentops in Assayas' Désordre

don't know if thse were mentioned but:

Oingo Boingo in Back To School
Gibby Haynes in Nowhere
Bob Dylan in Masked and Anonymous
Teresa Taylor in Slacker

and of course Richard Edson, Gordon Gano, Debbie Harry, David Johansen, LL Cool J, Kate Pierson, Iggy Pop, Michael Stipe in The Adventures of Pete and Pete... but that's a tv show

Nick Cave seem's to have appeared in loads of films, but no one mentioned his part in Wings of Desire.

Flea in BTTF 3.
Mudhoney in Black Sheep
J in these http://www.imdb.com/name/nm0556208/

Billy Idol in the Wedding Singer

Hah!

Meatloaf in Tenacious D: Pick of destiny...

That was him? Okay...

Also, David and Arthur from the New York Dolls acted in a movie, but I cant remember which

Tim Buckley in the Christian Licorice Store:
http://www.youtube.com/watch?v=f4OTQ1MWk74

Sting in Dune

pscha, i posted some stuff that has been repated since page 1 :p

accept it, it's the nature of the internet that people want to be seen-- but not see :D

ZZ Top in Back To The Future 3

we can take comfort in that we know more and we were first.

ha ha ha. i don't know so much about musicians but i know about movies.

guess what-- just got a projector loaned-- im having a little saturday movie festival.

saturday matinee: walace & gromit: a grand day out/ a close shave / the wrong trousers

scheduled for later today: ran, the brown bunny, city heat, le samourai, plus some abstract/experimental shorts, plus rivers & tides (documentary)

the pleasure, the pleasure...