Among the well-wishers who came to greet the leader were Union Ministers Pranab Mukherjee, Ghulam Nabi Azad, Virbhadra Singh, C P Joshi and Pradesh Congress Committee chiefs and AICC office bearers.
Regional representatives who came to extend their wishes were DMK leaders, T R Baalu and Tamil Nadu CM's daughter Kanimozhi.
The party had announced earlier that Sonia would not celebrate her birthday owing to party workers coming from far and wide to greet their leader. In spite of this, party supporters from Tamil Nadu and Karnataka converged at Sonia's residence beating drums and taking out processions.
Party workers clad in T-shirts displaying slogans like 'Our pride is mother India, our guide is mother Sonia' took out their own celebration at 24 Akbar Road, which is the party's central office.