List of Famous people who are 66

Ronald Edward Frederick Kimera Muwenda Mutebi II is the reigning Kabaka of the Kingdom of Buganda, a constitutional kingdom in modern-day Uganda. He is the 36th Kabaka of Buganda.

Valdis Zatlers is a Latvian politician and former physician who served as the seventh president of Latvia from 2007 to 2011. He won the Latvian presidential election of 31 May 2007. He became President of Latvia on 8 July 2007 and left office on 7 July 2011 after failing to win reelection for a second term.

James Paul Montgomery is an American former competition swimmer, four-time Olympic medalist, and former world record-holder. Montgomery was the first man to break the 50-second barrier (49.99) in the 100-meter freestyle, at the 1976 Summer Olympics in Montreal, Quebec, where he won three gold medals and one bronze.

Andrew Eben Strominger is an American theoretical physicist who is the director of Harvard's Center for the Fundamental Laws of Nature. He has made significant contributions to quantum gravity and string theory. These include his work on Calabi–Yau compactification and topology change in string theory, and on the stringy origin of black hole entropy. He is a senior fellow at the Society of Fellows, and is the Gwill E. York Professor of Physics.

John Victor Roos is an American businessman, attorney, and diplomat who served as United States Ambassador to Japan from 2009 to 2013. He is the Founding Partner of Geodesic Capital. Before accepting the ambassadorship from President Barack Obama, Roos was the CEO of Silicon Valley-based law firm of Wilson Sonsini Goodrich & Rosati.

Ricardo Armando Patiño Aroca is an Ecuadorian politician who has served as Minister of Foreign Affairs of Ecuador from 2010 until 2016, under the government of President Rafael Correa. Previously he was Minister of Finance and Minister of the Coast. He is one of the ideologists of The Citizens' Revolution who with Correa wanted to gradually introduce a democratic socialist government in Ecuador. On 4 March 2016, he was name as Defense Minister by President Correa.