The Biggest Loser Australia: Couples! With the help of the trainers, Michelle Bridges, and Shannan Ponton, a new set of overweight families, lovers and friends will change their lives forever. The contestant with the highest percentage weight lost will win a MASSIVE cash prize, and the title of The Biggest Loser!

The sixth season of the Australian version of the original NBC reality television series The Biggest Loser, known as The Biggest Loser Australia: Families, premiered on 30 January 2011 on Network Ten. This season saw the return of trainers Michelle Bridges, Shannan Ponton and Steve Willis (The Commando). It also introduced a new female trainer, Tiffiny Hall. The families included in this season are the Duncan Family, the Westren Family, the Challenor Family and The Moon Family.