Diego Giacometti was a Swiss sculptor and designer. He was the younger brother of the sculptor Alberto Giacometti.
Diego Giacometti only found his life's work in 1929, when his brother met the Parisian interior and furniture designer Jean-Michel Frank through the mediation of Man Ray - the photographer in the Surrealist group. From Frank, Alberto Giacometti received commissions for furnishings in plaster or bronze such as sconces, lamps, vases or fireplace sockets, which were intended for the apartments of the Parisian upper class. Diego Giacometti became an indispensable assistant to his brother Alberto, as he was a skilled craftsman and did the necessary preparatory work such as plaster casts and scaffolding for his brother's sculptures. He also helped with the actual sculpting work and sat model for him every day. They shared the same studio at 46 rue Hippolyte-Maindron in Paris and worked together on commissions for the Maeght and Noailles families. During the Second World War Diego Giacometti took courses at the Scandinavian Academy of Art and created his first animal sculptures. Animals had fascinated him since his childhood. From 1939 he created his own sculptural works and from 1950 he focused on furniture and objects.
After the death of his brother Alberto in 1966, Diego Giacometti concentrated entirely on his own work. It is believed that he created 4000 to 5000 objects and sculptures, which he sold to friends and acquaintances while still alive. For the Fondation Maeght he designed the interior of the "Café Diego" in Saint-Paul-de-Vence. This last major commission made him widely known to the public: Diego Giacometti designed the interior of the Musée Picasso in Paris, which opened in September 1985. He designed the furniture, the banisters, door fittings and ceiling lamps. Diego Giacometti was not able to witness the opening of the museum.