Boies: Supreme Court Will Take Prop. 8 

David Boies says it's a "dead certainty" the U.S. Supreme Court will hear the issue of marriage equality if a federal appeals court sustains the trial court's Wednesday decision overturning California's Prop. 8.

Boies -- who led the plaintiffs' legal team alongside Ted Olson -- made the prediction while speaking in an hourlong appearance San Francisco's Commonwealth Club. He declined to predict the case's chances before the Supreme Court.

He predicted the ninth U.S. circuit court of appeals would rule on the case later this year and the Supreme Court would follow in 2011.

Watch video here.

David Boies on Prop 8 & Supreme Court from JD Lasica on Vimeo.