Alexander, Crown Prince of Yugoslavia, is the head of the House of Karađorđević, the former royal house of the defunct Kingdom of Yugoslavia and its predecessor the Kingdom of Serbia. Alexander is the only child of King Peter II and his wife, Princess Alexandra of Greece and Denmark. He held the position of crown prince in the Democratic Federal Yugoslavia for the first four-and-a-half months of his life, until the declaration of the Federal People's Republic of Yugoslavia later in November 1945, when the monarchy was abolished. In public he claims the crowned royal title of "Alexander II Karadjordjevic" as a pretender to the throne.

The House of Karađorđević or Karađorđević dynasty is the name of the former ruling Serbian and deposed Yugoslav royal family.