
George Francis Rayner Ellis, FRS, Hon. FRSSAf, is the Emeritus Distinguished Professor of Complex Systems in the Department of Mathematics and Applied Mathematics at the University of Cape Town in South Africa.
He is considered one of the world's leading theorists in cosmology. He is an active Quaker and in 2004 he won the Templeton Prize. On 18 May 2007, he was elected a Fellow of the British Royal Society.
From 1989 to 1992 he served as President of the International Society on General Relativity and Gravitation. He is a past President of the International Society for Science and Religion. He is an A-rated researcher with the NRF.