Mel Gibson & Robyn Moore: ~ $425 Million Settlement
Oscar-award winning director and Braveheart actor Mel Gibson was married to his first wife Robyn Moore for 31 years and they had 7 children together. But in 2011, they finalized their divorce, and because there was no prenuptial agreement, Moore got half his wealth.
At the time, Gibson was worth more than $800 million, so Robyn got something in the ballpark of at least $425 million. The details of the judgement and terms of the settlement were kept secret from the public on request by either or both of the parties.