The United National Party Working Committee unanimously decided to nominate former Prime Minister Ranil Wickremesinghe as the party's national list MP.
Wickremesinghe, according to the decision, will enter Parliament next month and take oaths as a MP.
The former Prime Minister failed to secure a seat at the Parliamentary election last year and the UNP managed to secure only one national list seat.
The UNP national list MP will take oaths as a Parliamentary nearly 10 months after the Parliamentary election.