Valentin Alexandrovich Serov (19 January 1865 – 5 December 1911) was a Russian painter, and one of the premier portrait artists of his era.
Serov was born in Saint Petersburg, son of the Russian composer and music critic Alexander Serov and his wife and former student Valentina Serova, also a composer in her own right. Raised in a highly artistic milieu he was encouraged to pursue his talents by his parents and in his childhood he studied in Paris and Moscow under Ilya Repin and in the St. Petersburg Academy of Arts (1880–1885) under Pavel Chistyakov. Serov's early creativity was sparked by the realistic art of Repin and strict pedagogical system of Chistyakov. Further influences on Serov were the old master paintings he viewed in the museums of Russia and Western Europe, friendships with Mikhail Vrubel and (later) Konstantin Korovin, and the creative atmosphere of the Abramtsevo Colony, to which he was closely connected.
Valentin Serov died in Moscow on 5 December 1911, from stenocardia (an acute form of angina) that eventually led to cardiac arrest, ending in heart failure due to severe complications. He was buried at the Donskoye Cemetery. The Soviets had his remains exhumed and reburied at the Novodevichy Cemetery.