Former U.S. Secretary of State Hillary Clinton publicly announced today her support for marriage equality - ie: same-sex marriage.
In the video at the top, Clinton said "LGBT Americans are our colleagues, our teachers, our soldiers, our friends and our loved ones, and they are full and equal citizens and deserve the rights of citizenship. That includes marriage."
She added: "I support it personally and as a matter of policy and law embedded in a broader effort to advance equality and opportunity for LGBT Americans and for all Americans."
Clinton made the video for the advocacy group Human Rights Campaign.
She said, "like so many others, my personal views have been shaped over time by people I have known and loved."
She also noted that in Switzerland over a year ago, while she was still secretary of State, she said "gay rights are human rights, and human rights are gay rights".
And she said discussed the issue in "some pretty tough conversations with foreign leaders."
She also said she changed State Department policy "to ensure that our LGBT families are treated more fairly."
That, she said, "inspired and challenged me to think anew about who we are and the values we represent to the world."
During the 2008 Democratic presidential campaign, Clinton and Barack Obama both supported civil unions for same-sex couples, but not gay marriage.
Obama endorsed gay marriage last year.
And earlier this month, Clinton's husband - former president Bill Clinton - endorsed gay marriage in a op-ed for the Washington Post.
He even urged the U.S. Supreme Court to get rid of the Defense of Marriage Act, which he signed into law in 1996. You can read his op-ed here.
Of course, today's announcement is already raising speculation that Hillary Clinton might run for president in 2016.
Other potential Democratic candidates - including Vice-President Joe Biden, New York Governor Andrew Cuomo, and Maryland Governor Martin O'Malley - have all publicly endorsed same-sex marriage.
Gay marriage is also becoming more of a factor in the Republican party.
Last week, Rob Portman became the first Republican senator to publicly support same-sex marriage. Portman said he had a change of heart after finding out his son is gay.
According to a Gallup poll last November, 53% of Americans support same-sex marriage and 46% are opposed.