Xoliswa Bobani, widow of former Nelson Mandela Bay mayor Mongameli Bobani, will take up a seat in council for the UDM as coalition talks get underway.
Several municipalities in the Eastern Cape face hung councils following local government elections, setting the stage for intense coalition talks as no single party secured an outright majority.
National Alliance (NA) leader Gary van Niekerk has urged northern areas residents to vote out the DA, accusing the party of failing to improve conditions in their communities.