The AACTA Award for Best Original Screenplay is an award presented by the Australian Academy of Cinema and Television Arts (AACTA), for an Australian screenplay "written directly and originally for the screen".
[1] Prior to the establishment of the Academy in 2011, the award was presented by the Australian Film Institute (AFI) at the annual Australian Film Institute Awards (more commonly known as the AFI Awards).
[2] It was first handed out in 1978 when the award for Best Screenplay (which was first presented at the 1974-75 awards) was split into two categories: Best Original Screenplay and Best Adapted Screenplay.
The films and screenwriters in bold and in yellow background have won are the winners.
When sorted chronologically, the table always lists the winning screenplay first and then the other nominees.