Jimmy carter, Wife mark 60th Wedding Anniversary

In the long line of American presidents and first ladies, the Carters have the second longest marriage. George and Barbara Bush have been married for 61 years.

Jimmy Carter is 81. Rosalynn Carter is 78. They have four children and 11 grandchildren, and are expecting their first great-grandchild in September.

Friends and associates say the Carters remain as active as ever two and a half decades after leaving the White House.

"They continue to be full partners in the post-presidency to this day," said Deanna Congileo, spokeswoman for the couple. "They're continuing the work of the Carter Centre, strengthening democracy, advancing human rights and ending suffering around the world."