The attorney representing two same-sex couples who were denied a right to wed in California said on Thursday he expected the case to end up before the U.S. Supreme Court, which has yet to hear a case on the equal marriage issue.

"When it does get to the United States Supreme Court, we expect to win," Theodore Olson, who was solicitor general under former President George W. Bush, told reporters after the first hearing on federal lawsuit that was filed in May.