Robert F. Kennedy Jr.'s estranged wife has died.

Law enforcement sources tell TMZ, 52-year-old Mary Kennedy was found dead in her Mount Kisco, New York home this morning.

Mary and RFK Jr. were married for 16 years from 1994-2010. It's Robert's second marriage. Robert filed for divorce in May 2010. The couple has four children together.

There are reports Robert F. Kennedy Jr. is currently dating actress Cheryl Hines.

Three days after Robert filed divorce papers in 2010, Mary was arrested on suspicion of DUI.

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