Are there any musicals that didn't start off on stage?

Question:I know that most musicals started off on stage, before turning into a movie, but I have an idea for one that needs special effects, and I doubt it could ever be pulled off on stage. It'd be best suited for a movie.
I suppose I could write it as a book first, because I usually turn my ideas into books, without the music of course, and then maybe one day it can be turned into one...
But I was just wondering....

Best Answer - Chosen by Asker: I know that most musicals started off on stage, before turning into a movie, but I have an idea for one that needs special effects, and I doubt it could ever be pulled off on stage. It'd be best suited for a movie.
I suppose I could write it as a book first, because I usually turn my ideas into books, without the music of course, and then maybe one day it can be turned into one...
But I was just wondering....

Thoroughly Modern Millie was a movie first. So were all the Mel Brooks musicals. And Hairspray (but the original Hairspray movie wasn't a musical.) And Cry-Baby too. There are probably a lot more I'm forgetting. And Moulin Rouge, but I don't know if that really counts. If you want your idea to be a movie, go for it! There are no rules in show business, and nobody's going to make you put it on stage first.

Singing in the Rain, Young Frankenstein and The Producers come to mind. There are probably more.

Do you mean something like Wicked, which was originally a book that was turned into a play/musical?

Let's see: Phantom of the Paradise. Rocky Horror Picture Show. The Rose. All of the Beatles' movies including Across the Universe. All of the Fred Astaire movies (except Finian's Rainbow).

phantom of the opera started as a novel and sold so poorly that as i recall it was actually only published in smaller pieces in a paper to begin with

"Leagally Blonde, the Musical" is an offshoot of the Legally Blonde movie.

Disney has turned several movies into plays, like "Beauty and the Beast".