Professor Ruth Gregory is a Professor of Theoretical Particle Physics in the Department of Physics, King's College London. Professor Ruth Gregory joined King's in 2021 from Durham University, where she has been Professor of Mathematics and Physics since 2005. She served as Head of the Department of Physics at King's between January 2021 and July 2025. 

She studied for her PhD at DAMTP, Cambridge in Stephen Hawking’s Relativity research group. She moved to Chicago as a Research Associate at the Fermi National Accelerator Laboratory, then a McCormick Fellow at the Enrico Fermi Institute, University of Chicago, before moving back to the UK on a PPARC Advanced Fellowship, then a Royal Society University Research Fellowship before joining the Maths and Physics faculty at Durham in 2005. In 2006, she was awarded the Maxwell Medal by the Institute of Physics and in 2011 received a Royal Society Wolfson Merit Research Award.

Research interests 

• General Relativity
• Black Holes
• Cosmology