Former Secretary of State Hillary Clinton announced for the first time Monday she supports marriage rights for same-sex couples, saying that "gay rights are human rights, and human rights are gay rights."

"America is at its best when we champion the freedom and dignity of every human being," Clinton said in a video produced by the Human Rights Campaign.

The former first lady, U.S. senator, and 2008 presidential candidate had previously backed civil unions and partner benefits for same-sex couples, but had stopped short of a full endorsement for marriage. That was the position of most Democratic primary candidates that year, including President Barack Obama.

During her tenure as secretary of state, Clinton avoided taking political positions, as is customary for the role.

Her husband, former President Bill Clinton, wrote in an opinion article last week that he supported the repeal of the Defense of Marriage Act, the law he signed in 1996 that defines marriage as a legal union between a man and a woman. It also denies federal benefits to same-sex couples in the nine states where same-sex couples can now legally wed.

In the video released Monday, Hillary Clinton said her time traveling the world as America's top diplomat "inspired and challenged me to think anew about who we are, and the values we represent to the world."

Those values, she said, must include full equal rights for gay and lesbian Americans to marry.

"Full and equal citizens and deserve the rights of citizenship," she said. "That includes marriage. That's why I support marriage for lesbian and gay couples. I support it personally and as a matter of policy and law."