Sir Andre Konstantin Geim is a Russian-born Dutch-British physicist working in England in the School of Physics and Astronomy at the University of Manchester.
Geim was awarded the 2010 Nobel Prize in Physics jointly with Konstantin Novoselov for his work on graphene. At that time he was a Dutch citizen. He later became a British citizen to accept a knighthood and considers himself Dutch-British. Geim is Regius Professor of Physics and Royal Society Research Professor at the National Graphene Institute. Geim was previously awarded an Ig Nobel Prize in 2000 for levitating a frog using its intrinsic magnetism. He is the first and only individual, as of 2025, to have received both Nobel and Ig Nobel prizes, for which he holds a Guinness World Record.