Brad Pitt is chipping in $100,000 to the effort to defeat a California proposition that would ban gay marriage.

His contribution is one of the largest single donations coming from the entertainment industry, in a fund-raising effort that so far is lagging behind those who want to pass a state constitutional amendment in the state to ensure that marriage is between a man and a woman.

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Pitt said in a statement, “Because no one has the right to deny another their life even though they disagree with it, because everyone has the right to live the life they so desire if it doesn’t harm another, and because discrimination has no place in America, my vote will be for equality and against Proposition 8.”

Political consultant Trevor Neilson, who represents Pitt and Angelina Jolie, says, “I think Brad sees this as a human rights issue and an issue of justice.”

There has been some rumbling over the lack of contributions coming so far from entertainment industry donors, perhaps because of the overload of fund-raisers as Election Day approaches. (See story here and here). But Ron Burkle plans to hold a No on Proposition 8 event in October.

“I would say the entertainment community needs to step up to the plate and fight this,” Neilson says.

Political strategist Chad Griffin, who has been working to defeat Proposition 8, says, “We applaud Brad Pitt for his leadership on this important issue, and for giving us vital help against the national fundraising machine we are facing.”