CNN — Rosalynn Carter, who as first lady worked tirelessly on behalf of mental health reform and professionalized the role of the president’s spouse, died Sunday at the age of 96, according to the Carter Center.

“Rosalynn was my equal partner in everything I ever accomplished,” her husband, former President Jimmy Carter, said in a statement. “She gave me wise guidance and encouragement when I needed it. As long as Rosalynn was in the world, I always knew somebody loved and supported me.”

This is a breaking story and will be updated.