Weaver won a Best Supporting Actress Academy Award nomination for her role as the matriarch of a notorious Melbourne crime family, but lost out to The Fighter star Melissa Leo.
She has now triumphed Down Under with a Best Actress prize at the Film Critics Circle of Australia Awards, which were announced on Sunday (13Mar11).
Animal Kingdom was also named Best Film, Best Actor went to Ben Mendelsohn and Best Supporting Actor to Joel Edgerton.
The movie's director, David Michod, took the Best Director accolade and he also won Best Original Screenplay.
Awards also went to South Solitary and Beneath Hill 60, while The Social Network was named Best Foreign Film - English language.