Robyn Moore and Mel Gibson Robyn Moore and Mel Gibson

A Superior Court judge finalized Mel Gibson's divorce on Friday from Robyn Moore, his wife of 30 years, The Associated Press reports.

Almost all details of the split were kept confidential, but reports say Moore stands to get a big pay-off from the divorce. Because there was no prenuptial agreement, it was ruled that Moore is entitled to half of everything the actor earned during their three-decade-long marriage, according to Entertainment Tonight. Gibson's fortune was once estimated by the Los Angeles Business Journal to be worth approximately $850 million.

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Moore filed for divorce in April 2009, but Gibson alleged they had been living apart since 2006. That was the year Gibson was famously arrested for a DUI in Malibu and made anti-Semitic and misogynistic remarks to his arresting officers.

The Braveheart actor, 55, and Moore were married in 1980 and have seven children together, but their 12-year-old son is the sole minor and, therefore, the only one subject to a custody agreement.

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Moore defended her estranged husband last year when he was engaged in an ugly custody battle with Gibson's girlfriend Oksana Grigorieva, with whom he has a 2-year-old daughter, Lucia. Grigorieva accused Gibson of domestic violence after recordings were leaked of him allegedly yelling at her and  threatening her. He pleaded no contest — but admitted no fault — to a misdemeanor battery count in March. Moore filed a brief declaration in the case stating that Gibson had never physically abused her or their children.