The latest Hollywood stars to join the fight against California's Proposition 8, the Nov. 8 ballot initiative seeking to ban gay marriages in the state, are director Steven Spielberg and his wife, Kate Capshaw, who gave away $100,000 to the No-on-8 campaign, the couple announced Tuesday.

"By writing discrimination into our state constitution, Proposition 8 seeks to eliminate the right of each and every citizen in our state to marry regardless of sexual orientation," the couple said in a statement, "Such discrimination has NO place in California's constitution, or any other." Proposition 8 is due to hit the California ballot this November and, if approved, would render unconstitutional the swapping of same-sex vows.

The campaign fighting against Proposition 8 has raised $12.4 million while the main group promoting the Constitutional amendment, which would overturn a recent California Supreme Court ruling that legalized same-sex marriage, has raised $17.8 million. Financial backing is critical to the ability of both sides to air ads promoting their position, with weekly spots costing anywhere from $3.5 million to $5 million in order to ensure state voters view them 7 to 10 times.

Producer Bruce Cohen, who was married in June to Gabriel Catone in a ceremony performed by Los Angeles Mayor Antonio Villaraigosa and who has been working on the campaign to defeat Proposition 8, said in a statement, "It's phenomenal that Kate and Steven are affirming their unwavering commitment to equality in such a significant a way. More than 15 years ago, Steven was the first person in Hollywood who I came out to, news which he greeted with his full love and support then and ever since. It is my fervent hope that other entertainment industry leaders will follow the lead of Brad Pitt and the Spielbergs and fight to maintain equal rights for all Californians."

A recent field poll indicates that 55 percent of voters said they would vote no to the proposed amendment, while 38 percent said they would support it, Variety reported.

A week ago, Brad Pitt, who famously told Esquire magazine that he and partner Angelina Jolie would not tie the knot until everyone who wanted to could, donated $100,000 to the same campaign fighting the ballot initiative attempting to take away gay couples’ right to marry.

"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," the actor said last Wednesday.

It's always refreshing to see celebrities fighting for their beliefs and using their celebrity to bring attention to a cause. Brad and Angelina were recently ranked sixth in Parade magazine’s list of the most generous celebrities of 2007. The couple donated $8.4 million.