Vladimir Vladimirovich Nabokov^[b] (Russian: Владимир Владимирович Набоков [vlɐˈdʲimʲɪr vlɐˈdʲimʲɪrəvʲɪtɕ nɐˈbokəf] (listen); 22 April [O.S. 10 April] 1899^[a] – 2 July 1977), also known by the pen name Vladimir Sirin (Владимир Сирин), was a Russian-American novelist, poet, translator and entomologist. Born in Russia, he wrote his first nine novels in Russian (1926–38). After 15 years in Berlin, he achieved international prominence after moving to the United States, where he began writing in English and also taught in college. Nabokov became an American citizen in 1945. He and his wife returned to Europe, settling in Montreux, Switzerland in 1961.

Nabokov's Lolita (1955) was ranked fourth in the list of the Modern Library 100 Best Novels in 2007; Pale Fire (1962) was ranked 53rd on the same list; and his memoir, Speak, Memory (1951), was listed eighth on publisher Random House's list of the 20th century's greatest nonfiction. He was a seven-time finalist for the National Book Award for Fiction.

Nabokov was also an expert lepidopterist and composer of chess problems.