On Thursday, Chief Deputy San Francisco City Attorney Therese Stewart was unanimously confirmed by a California state commission to a seat on the California Court of Appeal.

Stewart was nominated by California Governor Jerry Brown last month. Stewart is best known as a pioneer in the battle for marriage equality in California. In 2004, she defended then San Francisco Mayor Gavin Newsom for ordering the city clerk to issue marriage licenses to gay and lesbian couples.

She was a key player in the case against Proposition 8 as she argued for the City of San Francisco against the state’s discriminatory marriage ban.