Katherine Jane Willis CBE FGS is a biologist, who studies the relationship between long-term ecosystem dynamics and environmental change. She is Professor of Biodiversity in the Department of Zoology, University of Oxford, and an adjunct Professor in Biology at the University of Bergen. In 2018 she was elected as Principal of St Edmund Hall, and took up this position from 1 October.She held the Tasso Leventis Chair of Biodiversity at Oxford and was founding Director, now Associate Director, of the Biodiversity Institute Oxford. Willis was Director of Science at the Royal Botanic Gardens, Kew from 2013-2018.