"Now that same-sex marriage in Virginia is officially legal, we owe it to all Virginians to ensure that every couple is treated equally under all of our laws, no matter whom they love," said McAuliffe, a Democrat in his first year in office.
"This historic decision opened the door to marriage equality, and now it is my sincerest hope that it will also open more doors for Virginia children who need loving families."
Polls had shown a majority of Virginia voters approving of gay marriage and following McAuliffe's swearing-in in January, after four years of Republican rule, state officials had said they would no longer defend the state's ban on the practice.

A spokesman for The Family Foundation of Virginia, which opposes adoptions by gay or lesbian couples, denounced the action.
"We now live in a Virginia where the government is intentionally going to deny children either a mom or a dad, simply to appease the desire of adults and not in the best interest of kids," Chris Freund said.