It's a pretty simple and straightforward message, clearly from the heart: "I'm Barbara Bush, and I'm a New Yorker for marriage equality. New York is about fairness and equality, and everyone should have the right to marry the person that they love. Join us."

Her dad, who supported a constitutional amendment to ban gay marriage, had no comment.

The New York Times notes that while politicians, particularly conservative Republicans, have been loathe to support marriage equality -- their spouses and children have not been. Meghan McCain. Mary Cheney. Laura Bush. Now Barbara Bush.

Here's the video.