The May Coup was a coup d'état which resulted in the assassination of King Alexander I of Serbia and his consort, Queen Draga, inside the Royal Palace in Belgrade on the night of 10–11 June [O.S. 28–29 May] 1903. This act resulted in the extinction of the Obrenović dynasty that had ruled the Kingdom of Serbia since the middle of the 19th century. A group of Royal Serbian Army officers led by Captain Dragutin Dimitrijević (Apis) organized the assassination. After the May Coup, the throne passed to King Peter I of Serbia.

Alexander I reigned as the king of Serbia from 1889 to 1903 when he and his wife, Draga Mašin, were assassinated by a group of Royal Serbian Army officers, led by Captain Dragutin Dimitrijević.