Will (William) Allen Alsop, OBE RA (born 12 December 1947) is a British architect based in London. He is responsible for several distinctive and controversial modernist buildings, most in the United Kingdom. Alsop’s buildings are usually distinguished by their use of bright colour and unusual forms. While Alsop has won praise from some critics and fans of avant-garde architecture, he has also faced criticism from fellow architects and some segments of the general public.
Alsop regards as his architectural heroes Le Corbusier, Sir John Soane, Mies van der Rohe and John Vanbrugh. His avant-garde, modernist buildings are usually distinguished by their vibrant use of bright colour and unusual forms; they have won praise and criticism in equal measure.
In 2009 he opened a new office under the umbrella of RMJM, another major British architectural firm.