Governor K Rosaiah administered the oath of office and oath of secrecy to S P Velumani, Agri S S Krishnamoorthy and Gokula Indira, who had been part of the J Jayalalithaa-cabinet earlier also, but were removed by her at different points of time.
The swearing-in ceremony was held in the presence of Tamil Nadu Chief Minister J Jayalalithaa.
On Monday, Jayalalithaa had dropped Agriculture Minister S Damodaran, Revenue Minister B V Ramanaa and Labour Minister K T Pachamal from her Cabinet.
Krishnamoorthy is Minister for Agriculture while Velumani and Indira have been allotted the portfolios of Municipal Administration and Rural Development and Handlooms and Textiles respectively.