De Lille and Winde will be running for premier alongside former Cape Town mayor and Western Cape Premier Peter Marais, who announced himself as the Western Cape Premier Candidate for the Freedom Front Plus.
The ANC has yet to announce their premier and mayor candidates.
In the Western Cape, De Lille was the only premier candidate, and her nomination by the Provincial Co-ordinating Committee was unanimous, said Good spokesman Brett Herron.
De Lille’s party, Good, was launched on 2 December 2018.
Last week, the party launched its election manifesto, “The GOOD Plan to Fix South Africa (#FIXSA)”.