**Anton Nikolayevich Kapustin** is a Russian-American theoretical physicist and the Earle C. Anthony Professor of Theoretical Physics at the California Institute of Technology, and a former member of the Simons Center for Geometry and Physics at Stony Brook University. His interests lie in quantum field theory and string theory. He has also done pioneering work in non-commutative geometry.

Kapustin was born in Moscow, Russia on November 10, 1971. After earning a B.S. in physics from Moscow State University, in 1993 he received a Ph.D. in physics from the California Institute of Technology (Caltech) in 1997. His adviser was John Preskill.{cn}}

His celebrated recent work with Edward Witten rephrases the geometric version of the Langlands conjecture in terms of certain dualities in supersymmetric gauge theories.

He is the son of the pianist-composer Nikolai Kapustin.

He gave an invited talk at the International Congress of Mathematicians in 2010 on the topic of "Mathematical Physics".

Kapustin has three children: Camilla, Anton, and Valentina.