RDI may refer to:

John James "Jean" Charest, PC, MNA (pronounced: [ʒɑ̃ ʃɑʁɛ]; born June 24, 1958) is a Canadian politician who has been the 29th Premier of Quebec since 2003. He was the Deputy Prime Minister of Canada from June 25, 1993 until November 3, 1993. Charest was the leader of the federal Progressive Conservative Party of Canada from 1993 to 1998 and has been leader of the Quebec Liberal Party since 1998.

Charest was born in the Eastern Townships central city of Sherbrooke, Quebec, the son of Rita (née Leonard), an Irish Quebecer, and Claude "Red" Charest, a French Canadian. He obtained a law degree from the Université de Sherbrooke and was admitted to the Barreau du Québec in 1981. He is married to Michèle Dionne (since June 21, 1980) and they have three children, Amélie, Antoine, and Alexandra. Charest is completely bilingual in French and English.

He worked as a lawyer until he was elected Progressive Conservative member of the Canadian Parliament for the riding (electoral district) of Sherbrooke in the 1984 election. From 1984 to 1986, Charest served as Assistant Deputy Chair of Committees of the Whole of the House of Commons. In 1986, at age 28, he was appointed to the Cabinet of then Prime Minister Brian Mulroney as Minister of State for Youth. He was thus the "youngest cabinet minister in Canadian history." He was appointed Minister of State for Fitness and Amateur Sport in 1988, but had to resign from cabinet in 1990 after improperly speaking to a judge about a case regarding the Canadian Track and Field Association. He returned to cabinet as Minister of the Environment in 1991.