VIDEO : Emily Blunt Talks Sibling Rivalry: 'We Slapped Each Other, Like, Badly in the Face'

Emily Blunt just got real about sibling rivalry. The red carpet premiere of The Huntsman: Winter's War happened to occur on the heels of National Sibling Day, and when the film's heroine?who plays the literally icy sister of Charlize Theron's terrifying Queen Ravenna?stopped by to chat with E! News' Zuri Hall, she asked if Blunt had ever experienced any sibling drama in real life.