Gibson, who was born in America but grew up in Australia, became a major star in Tinseltown with his role in the Mad Max franchise, and he cemented his place with the Lethal Weapon movies and a double Oscars win for his 1996 blockbuster Braveheart.
Several Australians, including Bana, followed him into a Hollywood career, and the Hulk star is convinced Gibson is the man all actors from Down Under have to thank.
He tells British newspaper The Independent, "What a lot of us Australians saw in Mel Gibson's career was that you could, in fact, become an actor. It was a bit of a breaking down of the door. Mad Max was a seminal film, my favourite of all time."