Alexandros Papathanasiou is a Greek-born filmmaker behind the feature documentary White Mountains, produced over 10 years and portraying the late Crete-born guerrilla fighter, political prisoner and author Lefteris Eliakis. Papathanasiou was born in Athens in 1980 and studied broadcasting and documentary filmmaking in the UK. He is a cinematographer and camera operator at Imperial College London. Previous films include the short documentary Perspectives, a portrait of Kostas Kazakos (which received an honorary award at the London Greek Film Festival), and An Uncertain Future, about the plight of Syrian refugees in Greece.

Filmography