Former US Vice-President Al Gore and his wife Tipper are separating after 40 years of marriage.
Mr Gore, 62, who was Bill Clinton's vice-president from 1993 to 2001, won the 2007 Nobel Peace Prize for his work on climate change.
Mrs Gore, 61, is a longtime advocate on mental health issues.
The couple, who married in May 1970, lived in Tennessee. They have four children.
In an email to friends and supporters, they said they had decided to separate after "long and careful consideration".
They asked for privacy and said they intended no further comment.