Liam Hemsworth has revealed that he bonded with his The Hunger Games co-star Josh Hutcherson when they "threw up" together.

The Australian actor made the revelation on Good Morning America today as he was greeted by screaming fans in New York's Times Square.

He said that he wanted to lose a little bit of weight in preparation for the role but that Josh got him hooked on burgers from White Castle.

"I didn't even know White Castle existed and then we went to Kentucky, where he's from," Liam explained.

"And we went to White Castle. We thought it was a good idea to play basketball right after White Castle and threw up a little bit together.

"It was a real bonding moment."

Liam added that he is relieved to now have seen the hugely anticipated movie for the first time and believes it lives up to all of the hype it is receiving.

"Now that I've seen it, I feel great," he said. "It's honestly one of the most powerful films I've ever seen and everyone in it is amazing."