Governor Balmiki Prasad Singh will administer the oath of office and secrecy to Pawan Kumar Chamling and his Cabinet colleagues.
Earlier, Chamling submitted resignation of his council of ministers to Singh on Tuesday, May 19 and staked claim to form the next government.
Singh invited Chamling to form the next government on the basis of the majority being enjoyed by the ruling Sikkim Democratic Front (SDF).
On Monday, May 18 party's all 32 MLAs met at Chamling's official residence, Mintokgang, and unanimously elected the 59 year-old Chamling the SDF Legislative Party leader.
First time MLA Neeru Sewa from West Pendam (SC) seat proposed a resolution for the election of the SDF President as the legislature party leader.
Another MLA, C B Karki seconded it. All the other legislators supported it.
This will be Chamling's fourth successive term as Chief Minister of the state.