Original Cast is the name of more than one artist:
1) Electronic dance music
2) an alias of Original Israeli Yiddish Cast

But most track here appears here due to incorrectly tagged tracks for a various broadway shows. If this is the case, do last.fm and yourself a favour. Fix your tags by putting the actual artist name in the artist field. Not the show name, not "original cast", but the actual artist name. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.