According to widely disputed provisional results announced on 20 August, Kabila won 45% of the vote; his main opponent, vice-president and former rebel leader Jean-Pierre Bemba, won 20%. The irregularities surrounding the elections results prompted a run-off vote between Kabila and Bemba which was held on 29 October. On 15 November, the electoral commission announced the official results and Kabila was declared the winner, with 58.05% of the vote. These results were confirmed by the Supreme Court on 27 November 2006, and Kabila was inaugurated on 6 December 2006 as the country's newly elected president. He named Antoine Gizenga, who placed third in the first round of the presidential election (and then backed Kabila in the second round) as prime minister on 30 December.