Max is back and he's set to be madder than ever - but will Mel Gibson be on board?

It was 1979 when a fresh-faced Gibson, then aged 21, took the lead in the first Mad Max movie.

Mel Gibson in a scene from Mad Max 2.

Director George Miller says pre-production is well underway for the fourth instalment of the hugely successful franchise.

But he was tight-lipped on whether Gibson was being cast for the movie, titled Mad Max: Fury Road.