Mary-Kate Olsen Demands Immunity: World Raises Collective Eyebrow The loss of innocence is a big thing in the life, marking the point when they stop being a child and truly become an adult. When it comes to the world of celebrities, however, this distinction is harder to make. Thank golly gosh for the Olsens then, who we've been able to watch all their lives as they became adults! With problems! The latest occurrence in Mary-Kate Olsen's quest for womanhood has come as she seeks immunity from prosecution in the investigation into Heath Ledger's death earlier this year. Oh how she's grown!