This takes the number of justices of the apex court from 12 to 20.
President Muhammadu Buhari appointed the justices following their nomination by the National Judicial Council (NJC).
They were confirmed by the Senate on October 13.
Afterward, they joined their 12 already seated seniors on the bench.
The new justices were elevated from the Court of Appeal.
They are: Justices Lawal Garba (North West), Helen Ogunwumiju (South West), Abdu Aboki (North West), and M. M. Saulawa (North West).
Others are Justice Adamu Jauro (North East), Samuel Oseji (South South), Tijani Abubakar (North East) and Emmanuel Agim (South South).