Besides Tewari, the new members are Law Minister Ashwani Kumar and Parliamentary Affairs Minister Kamal Nath.
The re-constitution of the GoM was necessitated following resignation of Ambika Soni as I&B Minister and shifting of Pawan Kumar Bansal from Parliamentary Affairs to Railways.
"The GoM on Media has been re-constituted on the basis of portfolios the ministers hold," an official said.
Interestingly, External Affairs Minister Salman Khurshid, who earlier held the Law and Justice portfolio, continues to be a member of the GoM on Media.
The GoM is chaired by Finance Minister P Chidambaram.
Health Minister Ghulam Nabi Azad, Telecom Minister Kapil Sibal, Minister of State in the PMO V Narayanasamy are other members of the GoM.
The Group of Minister on Media was set up in May last year to counter the strident opposition attack on the government in the wake of 2G spectrum allocation issue.