Thesis is a 1996 Spanish horror-thriller film. It is the feature debut of director Alejandro Amenábar and was written by Amenábar and Mateo Gil. It stars Ana Torrent, Fele Martínez and Eduardo Noriega. The film won seven Goya Awards including Best Film, Best Original Screenplay and Best Director.

Alejandro Fernando Amenábar Cantos is a Chilean-Spanish film director, screenwriter and composer. He has won nine Goyas—including a Goya Award for Best Director for his 2001 film The Others— two European Film Awards and one Academy Award for Best Foreign Language Film for The Sea Inside among other honors. He has written the screenplays to all seven of his films and composed almost all of their soundtracks.