World Awards Media GmbH, the event promoter, says Jackson's brother Jermaine is expected to announce the lineup for the concert within two weeks.
Officials in the Austrian capital said Wednesday they are thrilled to host the three-hour event. Organizers say it will feature about 10 major entertainers who will perform 15 to 20 of Jackson's hits on a crown-shaped stage outside Vienna's Schoenbrunn Palace.
Jackson died in Los Angeles on June 25.
Jermaine Jackson says Vienna was chosen as the venue because his brother "loved castles."