President Maithripala Sirisena and former President Chandrika Bandaranaike Kumaratunga arrived at the 70th anniversary rally of the UNP a short while ago.
They climbed on the stage at the Campbell Park in Borella with UNP leader Ranil Wickremesinghe and other leaders of the party.
Sirisena is the leader of the SLFP which was the main rival party to the UNP until the formation of a consensus government in 2015. Sirisena also took part in the last year's UNP anniversary.