Top 10 celebrity break-ups in 2009

8.Mel Gibson and Robyn

Mel Gibson's wife Robyn filed for divorce after 28 years of marriage. In the papers -- signed Apr. 9 -- she cited "irreconcilable differences." Robyn -- who split from Gibson nearly three years earlier around the time of his infamous DUI arrest -- lists the date of separation as "to be determined."

Robyn, who has seven children with Gibson, had requested spousal support and attorneys' fees. The actor welcomed a baby daughter, his first child with girlfriend Oksana Grigorieva Last November.