The members were Fátima Padinha, Teresa Miguel, Tozé Brito and Mike Sergeant.
The group started in 1976, with Tozé Brito, Teresa Miguel, Mike Sergeant and Isabel Ferrão.
However, every song was sung by two performers, and the audience preferred Os Amigos over Gemini.
Toze Brito and Mike Sergeant had previously been in the grupo Quarteto 1111 in the Portuguese National Finals.
After their participation, in 1977, Isabel Ferrão left the group and was replaced by Fátima Padinha.