Raging Bull Robert De Niro has been financially gored by furious wife Grace Hightower’s demand for half of his staggering $500 million fortune — despite a 2004 prenuptial agreement that limits her to a $6.5 million payout.

Her money grab in Manhattan Supreme Court sets the stage for an ugly and embarrassing airing of dirty laundry for the extremely private 75-year-old Goodfellas star, who filed for divorce under “Anonymous v. Anonymous” in December and wants custody of their seven-year-old daughter, Helen.

Grace has slugged the Casino actor with documents to KO the prenuptial pact she signed when they remarried in 2004. That document gives her a megabucks payout, a Manhattan apartment, $1 million a year in alimony and half the value of another property.

Get the latest issue of GLOBE Magazine today to learn about this blockbuster divorce!