Nicole Richie Feels 'Beside Myself' With Excitement Over Sister Sofia's Pregnancy (Exclusive)

Nicole Richie chats with ET's Cassie DiLaura at the Los Angeles premiere of 'Don't Tell Mom the Babysitter's Dead,' in theaters on April 12. The star reacts to being a part of the film after being a 'die hard' fan of the original 1991 version, starring Christina Applegate. Plus, Nicole shares her excitement over younger sister Sofia's pregnancy, and her brother-in-law, Benji Madden, welcoming his second child, Cardinal, with his wife, Cameron Diaz.