Alexandre Dumas, born Dumas Davy de la Pailleterie, also known as Alexandre Dumas, père, was a French writer. His works have been translated into nearly 100 languages, and he is one of the most widely read French authors. Many of his historical novels of high adventure, including The Count of Monte Cristo, The Three Musketeers, Twenty Years After, and The Vicomte de Bragelonne: Ten Years Later were originally published as serials. His novels have been adapted since the early twentieth century for nearly 200 films. Dumas' last novel, The Knight of Sainte-Hermine, unfinished at his death, was completed by a scholar and published in 2005, becoming a bestseller. It was published in English in 2008 as The Last Cavalier.

Prolific in several genres, Dumas began his career by writing plays, which were successfully produced from the first. He also wrote numerous magazine articles and travel books; his published works totaled 100,000 pages. In the 1840s, Dumas founded the Théâtre Historique in Paris.

Dumas' father (general Thomas-Alexandre Davy de la Pailleterie) was born in Saint-Domingue (present-day Haiti) to a French nobleman and an enslaved African woman. His father's aristocratic rank helped young Alexandre acquire work with Louis-Philippe, Duke of Orléans.

In the election of Louis-Napoléon Bonaparte in 1851, Dumas fell from favor, and left France for Belgium, where he stayed for several years. Upon leaving Belgium, Dumas moved to Russia for a few years, before going to Italy. In 1861 he founded and published the newspaper, L' Indipendente, which supported the Italian unification effort. In 1864 he returned to Paris.

Though married, in the tradition of Frenchmen of higher social class, Dumas also had numerous affairs (allegedly as many as forty). He was known to have at least four illegitimate or "natural" children, including a boy named Alexandre Dumas after him. This son became a successful novelist and playwright, and was known as Alexandre Dumas, fils (son), while the elder Dumas became conventionally known in French as Alexandre Dumas, père (father). Among his affairs, in 1866 Dumas had one with Adah Isaacs Menken, an American actress then at the height of her career and less than half his age. Twentieth-century scholars have found that Dumas fathered another three "natural" children.

The English playwright Watts Phillips, who knew Dumas in his later life, described him as, "the most generous, large-hearted being in the world. He also was the most delightfully amusing and egotistical creature on the face of the earth. His tongue was like a windmill – once set in motion, you never knew when he would stop, especially if the theme was himself."