Roadshow Films’ real-life story “Red Dog” has cumed $8 million in its third week at the Australian B.O., making it 2011’s highest-grossing Australian pic.

“Red Dog,” based on Louis de Bernieres’ bestselling tome about a loyal dog searching the Australian Outback for its owner, opened Aug. 4 to $1.8 million — this year’s biggest bow for a local pic in Oz — then grew 4% in its second outing to claim $1.87 million.

This past weekend, “Red Dog” took $2.3 million, beating out the debuts of “Cowboys and Aliens” ($2.1 million) and “Conan the Barbarian” ($645,000) but losing to “Friends With Benefits” ($2.6 million).

“Red Dog” is directed by Kriv Stenders from a script by Daniel Taplitz. Pic stars Josh Lucas (“The Lincoln Lawyer”) and Rachel Taylor (TV’s “Charlie’s Angels”).

Essential Entertainment is handling international sales and domestic along with International Creative Management.