John Dennis Lennon CBE MC (23 June 1918 – 16 April 1991) was a British architect, interior designer, and furniture designer. He was responsible for the interior design of the Queen Elizabeth 2 and of 190-192 Sloane Street, London. Lennon worked for Fry, Drew & Partners and became the first director of London's Rayon Centre. In 1950, he formed his own firm, Dennis Lennon and Partners, later significantly contributing to the 1951 Festival of Britain. He took over Hamper Mill, near Watford, restoring decaying buildings.