Thackeray's presence indicated a possible rapprochement between the two estranged Hindutva parties which fell apart just ahead of the Assembly polls following failure of seat sharing talks.
All eyes were on Modi and Uddhav, who shook hands and exchanged pleasantries.
With 121 BJP MLAs in a House of 288, Fadnavis is heading a minority government that has been asked to prove majority in two weeks. Sharad Pawar's NCP with 41 MLAs has already declared unconditional outside support to the new government.
Cabinet Ministers who were sworn in are Eknath Khadse, Sudhir Mungantiwar, Vinod Tawde, Pankaja Munde—all members of the BJP's state Core Committee--, Prakash Mehta, Chandrakant Patil and Vishnu Savara. The Ministers of State are Dilip Kamble and Vidya Thakur.