Marc Malkin Senior Film Awards, Events & Lifestyle Editor Rose Byrne jumped at the chance to voice Leatherhead in “Teenage Mutant Ninja Turtles: Mutant Mayhem” when producer-star Seth Rogen asked her to join the film. “It was ridiculous,” the “Physical” actor tells me. “Seth was like, ‘I want you to do just fully Aussie — just go for it!’ “I was like, ‘I’m going to do my best Eric Bana.’ This is an homage to Eric,” Byrne continues.