The official symbol of the Samagi Jana Balawegaya will be launched this evening by party leader Sajith Premadasa.
Telephone - the official logo of the symbol will be unveiled at a special ceremony at Waters Edge, Battaramulla, by Premadasa.
Former MPs, party leaders and organizers supporting the alliance are expected to join the event.
The Samagi Jana Balawegaya is likely to contest the upcoming election under their own symbol without any alliance with the UNP.