The main group promoting Proposition 8, which would overturn a California Supreme Court ruling that legalized same-sex marriage, has raised $17.8 million while the main No-on-8 campaign has raised $12.4 million, the Los Angeles Times reported Tuesday.

Movie director Steven Spielberg and his wife, actress Kate Capshaw, announced Monday they would match actor Brad Pitt's donation of $100,000 given last week to the No-on-8 campaign, the Times reported.