Houston Mayor Annise Parker has joined the NOH8 Campaign, which raises awareness and funds for gay rights causes, including ending California's 2008 voter-approved gay marriage ban, Proposition 8.

The campaign's Adam Bouska and his partner Jeff Parshley photograph celebrities, politicians, professional athletes and everyday folks with their mouths duct taped and the campaign's familiar “NOH8” slogan often written on one cheek.

In her photograph, released Monday at the group's Facebook page, Parker is wearing a white button-down blouse, her hands posed to form a heart shape.

Parker – the city's first openly gay mayor, now in her second term – posed for the campaign last fall at City Hall.

Also a co-chair of the gay marriage group Mayors for the Freedom to Marry, Parker recently credited President Barack Obama's support with moving the country forward on the issue.

“In fact, good things happened because when he made his public declaration that he changed his mind, the NAACP took a vote,” Parker told OutQ host Michelangelo Signorile. “[The League of Latin American Citizens] took a vote. Those major civil rights organizations now really are allied on this issue.”