BAIDOA, Somalia, Jan 4 (Reuters) - Somali Prime Minister Nur Hassan Hussein appointed 15 ministers on Friday to fill an expected 18-member cabinet to replace one he dismissed last month after ministers quit in a clan dispute.

"I've appointed 15 ministers and the rest of the ministers will be appointed soon. The new ministers will be sworn in tomorrow," Hussein said in Baidoa, where Somalia's parliament sits. (Reporting by Ahmed Mohamed in Baidoa; editing by Andrew Dobbie)