Fashion icon Diane von Furstenberg has become a grandmother again. On Monday, we can reveal, Ali Kay, the model fiancée of her son Alex, gave birth in Los Angeles to a son, Leon, named after Diane’s father. Alex, who had been on the French Riviera with friends, jetted back early after hearing that Ali had gone into labor. When asked about the new arrival, Diane told Page Six via e-mail, “All good! Love is life.” Leon is her fourth grandchild.