Winners have included Richard Borcherds, William Gowers, and Curtis McMullen, though not Gerald Lambreau, despite what you saw in Good Will Hunting.  
First given at Oslo in 1936, this prize is restricted to those under forty years of age, in order to reward promise as well as achievement, by the wishes of its endower.  Winners have included Richard Borcherds, William Gowers, and Curtis McMullen, though not Gerald Lambreau, despite what you saw in Good Will Hunting.  Andrew Wiles did not win, but was given a silver plaque for his proof of Fermat's Last Theorem.  FTP, identify this prize, awarded every four years by the International Congress of Mathematicians.
First given at Oslo in 1936, this prize is restricted to those under forty years of age, in order to reward promise as well as achievement, by the wishes of its endower.  
The Fields Medal