When she finished school, she went to Le Studio des Variétés in Paris, where she studied music, theatre, and dancing.

In 1989, she moved to Athens to work with several artists, sing in compilations, and in 1991, she released her first personal album Gia Proti Fora.

Inspired by the idea of her growing older as the time passes, the album was a mixture of pop and Greek folklore music.

Theofanous was the main composer and producer of Evridiki's first nine albums while he collaborated with Minos EMI A&r manager Vangelis Yannopoulos in 1998 and 1999.

In 2002, she also performed on stage as "Taptim" in the musical The King and I, produced by Mimi Denisi with very positive acceptance by public and critics.

After having a studio music break for almost three years, Evridiki released the album Oso Fevgo Gyrizo (2003), in which she wrote two songs.

The collaboration continued in 2018 when she appeared on stage once again with Lopodites and female singer Georgia Kerala (vocalist of the band Ble) at Ravens Music Hall in Limassol.

Besides George Theophanous and Dimitris Korgialas, she has worked with important personalities of the Greek music industry; Vasilis Papakonstantinou, Giorgos Hatzinasios, Yannis Spanos, Marios Tokas, Vangelis Dimitriadis, Christos Dantis, Natalia Germanou, Eleni Peta, Antonis and Yannis Vardis, Stelios Rokkos, and Sakis Rouvas.