She starred with the famous Dutch actor Rutger Hauer in the Chilean-Italian film Il Futuro, based on Roberto Bolaño's novel A Little Lumpen Novelita.

[4] Martelli studied at Saint George's College, Santiago and at the Pontificia Universidad Católica de Chile.

Later she had roles in the TV series Huaiquimán y Tolosa and movies like Machuca, Radio Corazón and Malta con Huevo.

[8] Her 2015 short Land Tides was a part of Factory Programme and premiered at the Cannes Director's Fortnight.

It was presented at Ventana Sur’s 5th Proyecta co-production forum,[11] and won the second Coprocity Development Prize.