Iron Man 3 has become the second most successful superhero movie of all time after zooming past US$1 billion in global ticket sales
Only fellow Marvel project The Avengers, which also starred Robert Downey Jr as Tony Stark, has grossed more around the world.
Batman film The Dark Knight is in third place.
It seems the only thing that may overshadow Iron Man 3 is Baz Luhrmann's The Great Gatsby, which opens in New Zealand on June 6.
Luhrmann's films have traditionally done well in the Sydneysider's homeland.