Mel Gibson and Robyn - After 28 years of marriage, Mel Gibson's wife has filed for divorce. People.com reports that the actor could cough up to USD 500 million as settlement to his ex-wife. This divorce is touted as one of the most expensive Hollywood divorces in recent times.

In Photo: Actor Mel Gibson and his wife attend the 69th Annual Academy Awards ceremony in Los Angeles, CA. (Getty Images)