Sir Anthony James Leggett, KBE, FRS, also Tony Leggett, has been a Professor of Physics at the University of Illinois at Urbana-Champaign since 1983. Professor Leggett is widely recognized as a world leader in the theory of low-temperature physics, and his pioneering work on superfluidity was recognized by the 2003 Nobel Prize in Physics. He has shaped the theoretical understanding of normal and superfluid helium liquids and strongly coupled superfluids. He set directions for research in the quantum physics of macroscopic dissipative systems and use of condensed systems to test the foundations of quantum mechanics. 

March 26th, 1938 in London (Age 86)