What movie had the most stars... before they were stars?

I thought of this while watching "Scott Pilgrim vs. the World" a few days ago. It has an insane amount of talent in secondary parts before they made it big, including:Brie LarsonAnna KendrickChris EvansAubrey PlazaMary Elizabeth Winstead (admittedly debatable when she got famous)Similar movies that come to mind..."Lord of the Rings":Viggo MortensenOrlando BloomIan McKellenSean BeanDavid Wenhamalso "The 40 Year old Virgin":Steve CarellSeth RoganPaul RuddElizabeth BanksJane Lynch via /r/movies http://ift.tt/2CtXB9I