Operação Triunfo (OT) is the Portuguese version of the original Star Academy (in the original Spanish version of the reality show Operación Triunfo broadcast by RTP).
The Portuguese version follows the regular format, with the 12-20 students being put into a music academy and training songs for a week, and singing in the "Gala" at the end of the week, usually on Saturdays.
A jury composed by four personalities of the music world will judge the students performances and nominate four of them.
Also there is a public vote to decide the "Favourite of the Week".
The fourth and final season was the first to introduce the showing of the castings.