Chopper (2000)

Why So Serious? Such is the wealth of dramatic roles that Bana now has under his belt, it's hard to believe that the granite-jawed Aussie was best known as a comedian before he starred in Chopper.

As real life convict-turned-author Mark 'Chopper' Read, Bana showed commitment by piling on the pounds for the physical transformation, and also bringing the performance to match. This role got Bana worldwide attention, and he wasted no time making good on the 'next big thing' hype.

If they played it for laughs... Bana's comedy was primarily sketch-based, so Chopper would have consisted of a random selection of incidents from the infamous crim's life, with Bana playing every role in every scene with the help of prosthetic fat suits and detachable ears.

See also: Virtually every film on his CV