Comic-Con 2010: Chris Hemsworth 'I Had To Really Bulk Up' For 'Thor'

Comic-Con 2010: Chris Hemsworth 'I Had To Really Bulk Up' For 'Thor'

Chris Hemsworth tells AccessHollywood.com’s Laura Saltman how he bulked up for his new movie, “Thor.” Also, he talks about how he battled brother Liam for the role.