The Norwegian Academy of Science and Letters has awarded the 2021 Abel Prize jointly to LMS Honorary Member László Lovász (Eötvös Loránd University, Budapest, Hungary) and Avi Wigderson (Institute for Advanced Study, Princeton, USA) ‘for their foundational contributions to theoretical computer science and discrete mathematics, and their leading role in shaping them into central fields of modern mathematics’. The London Mathematical Society congratulates both on receiving this prestigious honour.