Watch: Katherine Schwarzenegger Shares Rare Throwback Photo of Arnold Schwarzenegger, Maria ShriverKatherine Schwarzenegger will never terminate these ghostly memories. As Halloween nears, the Gift of Forgiveness author gave a look at her favorite spooky traditions growing up-and cosplaying different characters with her parents Arnold Schwarzenegger and Maria Shriver topped the list. "Getting into the spooky spirit," Katherine, 35, wrote on her Oct. 28 Instagram post. "Pumpkin patches, sticker jeans, and some littles who take Halloween very seriously. Countdown to candy starts... now.