Penelope Cruz and Adrien Brody's new bullfighting film has incurred the wrath of animal rights activists, who are furious after hearing reports about potential on-set animal slaughter.

People for the Ethical Treatment of Animals (PETA) have instructed supporters to disrupt filming on the set of MANOLETE, unless movie-makers agree to use computer technology instead of harming real bulls.

A source tells MSNBC's The Scoop website, "If it's true, it's rather shocking, because Penelope is a big animal-rights activist who has spoken out against bullfighting."

Actor Pierce Brosnan was admired for using digital technology when filming similar scenes on his new film The Matador.

A spokesman for PETA says, Bullfights are cowardly affairs that have no place in a modern world."