He is the paternal grandson of Vladimir Leonodovich, Knyaz Wiazemsky, Graf Levachov, and wife Sophia Ivanovna, Grafinya Vorontzova-Dachkova. His sister Anne wrote a few historical novels on their genealogy.
He has been a caricaturist for "Le Nouvel Observateur" since 1972 under the pen name Wiaz.