The Cabinet reshuffle will take place after October 14.

The reshuffle is likely to see a change in the top four ministries - home, finance, defence and external affairs. It is not clear yet which one it will be. Of the four, two have seen recent changes, with P Chidambaram moving to finance and Sushilkumar Shinde to home.

Several key portfolios in the Union cabinet have been lying vacant since Mamata Banerjee's Trinamool Congress, which has 19 MPs in the Lok Sabha, pulled out of the UPA last week.