Barrister and former DUP MP Emma Little-Pengelly has been co-opted as the new MLA for Lagan Valley.
DUP leader Sir Jeffrey Donaldson was elected to serve in the constituency following last week's historic Assembly election.
But earlier this week he indicated that he would not sit as an MLA in Stormont and instead intends to remain at Westminster as an MP until the Northern Ireland Protocol has been resolved.
