The actress is in Warsaw, Poland this week for the 13th World Summit of Nobel Peace laureates and she will be handed the Peace Summit Award today.
Stone, 55, has been involved with The Foundation For Aids Research since 1995, previously as their campaign chairman and now as global fundraising chairman.
A committee of Nobel Peace laureates decides on the winner of the Peace Summit Award each year, picking a figure from the world of culture and entertainment who have raised awareness of global issues.