Robert F Kennedy Jr's estranged wife has been found dead at her home in New York state.
No cause of death had been released, but US media reported the 52-year-old had been found hanged.
In a statement, the family of the 52-year-old said her "radiant and creative spirit" would be "sorely missed".
Mr Kennedy, a lawyer and radio host, is the nephew of President John F Kennedy and son of Senator Robert F Kennedy, both assassinated in the 1960s.
He was once divorced when he married Mary in 1994.
'Always kind'
The couple had four children over the 16 years of their marriage before he filed for divorce in 2010.
http://www.bbc.co.uk/news/world-us-canada-18098823