Perry v. Schwarzenegger (now known as Hollingsworth v. Perry) was filed on behalf of two same-sex couples by attorneys Ted Olson and David Boies in May 2009, asking for a preliminary order blocking Prop 8. When California Governor Arnold Schwarzenegger and Attorney General Jerry Brown declined to defend Prop 8 substantively, Judge Vaughn R. Walker allowed the initiative's proponents to enter the case to defend it. Lambda Legal, NCLR and ACLU filed a friend-of-the-court brief for the preliminary hearing complementing plaintiffs' briefing by explaining why Prop 8 should be held invalid regardless of the level of constitutional review.