Rob Reiner on Monday said he is confident the U.S. Supreme Court would overturn California's gay marriage ban, Proposition 8.

Reiner is a co-founder of the American Foundation for Equal Rights (AFER), the group challenging the constitutionality of the ban.

Appearing on The Stephanie Miller Show, which is now being broadcast on Current TV, Reiner said he viewed gay marriage as “the last leg of the civil rights race.”

“The gay community is the only community in America that is viewed as less under the law of any group so this last little piece that we can hopefully put in place with our federal court challenge to Prop 8 … There's still a lot of work to be done and I don't want anybody to think that we've won this. By no stretch of the imagination have we won this,” he said, referring to a federal appeals court's recent upholding of a lower court's decision which ruled the amendment unconstitutional.

“Years from now we'll look back and say, 'What was all the fuss about?' People will look back and say, 'You mean there was a time that women couldn't vote? There was a time that blacks couldn't vote or blacks couldn't marry whites?' I mean, we look at those things as ridiculous now and we will look at this as being ridiculous but right now we're in the middle of a fight and we have to keep fighting.”

“We're going to win this, but we've got to keep our foot on the gas.”

On the possibility of the case going to the Supreme Court, Reiner said: “They have upheld gay rights historically in Lawrence v. Texas, in Romer [v. Evans] case. And we believe that they will uphold us in this.”