The course is an elite one with 933 people applying for 20 places, The Local reported. An additional place was created for the princess.
Princess Victoria, 29, has had a varied education -- including study at the University of Angers in France and Yale, internships in the government of Sweden and the United Nations and basic military training. In the diplomat course, which runs from September to June, she will study Swedish foreign and security policy.
"The course will focus on various aspects of Swedish foreign policy and its relations with the rest of the world," said foreign ministry spokesman Jan Janonius.
The eldest child of King Gustaf and Queen Silvia, Victoria is expected eventually to succeed her father. Sweden's law of succession was changed in 1979 to give women the same standing as men.