The Gallery will be open until 9pm this Friday, Saturday and Sunday.
The biographical exhibition of Barry Humphries was the first display of its kind at the National Portrait Gallery.
Drawn from some of the many donations made to the Gallery's collection, the exhibition Portraits for Posterity pays homage both to the remarkable (and varied) group of Australians who are portrayed in the portraits and the generosity of the many donors who have presented them to the Gallery.
The exhibition begins with Barry's childhood in Camberwell, Melbourne and chronicles his days as a struggling actor in Australia and England, his creation of characters including Barry McKenzie, Dame Edna Everage, Sandy Stone and Sir Les Patterson