Thibault de Montbrial (born 1968) is a French lawyer who defended cyclist Bruno Roussel in the Festina affair.
Most recently, he was involved in the Armstrong affair.
He is the son of Thierry de Montbrial who directed the Center of Analysis and Prevision (CAP) of the French ministry of foreign affairs from 1973 to 1978 before Jean-Louis Gergorin, and of Marie-Christine de Montbrial.