Magnus Magnusson (born Magnús Sigursteinsson; 12 October 1929 – 7 January 2007) was an Icelandic-born British-based journalist, translator, writer and television presenter. Born in Reykjavík, he lived in Scotland for almost all his life, although he never took British citizenship. He came to prominence as a BBC television journalist and was the presenter of the BBC television quiz programme Mastermind for 25 years.