Ole Holger Petersen
Ole Holger Petersen  (born 3 March 1943) is a research professor at Cardiff University where he studies physiology, especially calcium signalling and the pancreas.  He was born in 1943 in Copenhagen, the first son of Joergen Petersen, an officer in the Danish navy, and Elisabeth née Klein, a pianist.

He was elected a Fellow of the Royal Society (FRS) in 2000 "for his major contributions to the understanding of the cell physiology of calcium signalling", and appointed a Commander of the Order of the British Empire (CBE) in the 2008 New Year Honours, "for services to Science".

He is also a Fellow of the Academy of Medical Sciences (FMedSci).