Much has been said about the legal duo who convinced a federal judge that California’s ban on same-sex marriage is unconstitutional: Ted Olson and David Boies. But Olson can find another close friend on the opposite side of the courtroom: Charles Cooper, a partner at Cooper & Kirk in Washington.

“He’s a marvelous lawyer and a good friend,” Olson said of Cooper, who is defending Proposition 8. They worked together in the Justice Department under President Reagan, and Cooper was Olson’s successor as assistant attorney general in the Office of Legal Counsel in 1985.