8. Mel Gibson & Robyn Moore: $425 Million
The couple first met towards the end of 1970s when they were both the residents of the same Adelaide Australia home. Mel Gibson got divorced from her former dental nurse wife in 2011. They were together for over 31 years before Moore filed for divorce, as a result Gibson was forced to hand over half of his $850 million wealth. His wealth mainly comes from his real estate business and of course the loads of commercially successful movies in which he starred in and directed as well.