Peter Goddard (born 3 September 1945) is a mathematical physicist who works in string theory and conformal field theory. Among his manycontributions to these fields is the Goddard–Thorn theorem (proved together with Charles Thorn). Goddard was educated at Emanuel School and the University of Cambridge, where he was a professor in the Department of Applied Mathematics and Theoretical Physics (DAMTP), founding deputy director of theIsaac Newton Institute for Mathematical Sciences and, until 2004, Master of St John's College. He was Director of the Institute for Advanced Study from January 2004 through June 2012. He is now a professor in the Institute's School of Natural Sciences.He was elected to the Royal Society in 1989, was awarded the Dirac Prize and Medal of the International Centre for Theoretical Physics in 1997, and was made a Commander of the Order of the British Empire in 2002.