Georges Livanos, known as "Le Grec", born September 25, 1923 in Marseille and died in the same city on May 21, 2004, was a French mountaineer of Greek origin. After a childhood in Marseille, Georges Livanos discovered the high mountains in Chamonix in 1937 at the age of 14, as well as climbing in the creeks of Marseille.

Most of his sporting career took place between 1941 and 1971, a period during which he opened some 500 routes in the creeks of Marseille, 40 in the Dolomites and around twenty in the Western Alps. It also repeats a number of major routes in these last two massifs. Georges and his wife, Sonia, collect an impressive series of firsts, female firsts and repeat firsts which have earned them the nickname "the most sestogrado couple in the world" (the sestogrado or sixth degree, representing the level of maximum difficulty in climbing up to in the late 1970s).