Olof Gustaf Hugo Lagercrantz (10 March 1911 – 23 July 2002) was a Swedish writer, critic, literary scholar (PhD 1951) and publicist (editor-in-chief of Dagens Nyheter 1960-1975). Lagercrantz was born in Stockholm, Sweden, the son of bank director Carl Lagercrantz and Countess Agnes Hamilton. He married Martina Ruin (born 1921), daughter of Professor Hans Ruin and Karin Sievers, in 1939. Lagercrantz is the father of actress Marika Lagercrantz and author David Lagercrantz.