Robert De Niro and his wife of more than 20 years, Grace Hightower, have split, Us Weekly can confirm. Celebrity Splits of 2018 The New York Post‘s Page Six, which broke the news, reports that the couple are not living together right now and that the Oscar winner has been appearing solo at events that he would normally attend with his wife over the past few months. The Raging Bull star, 75, married the actress and singer, 63, in 1997 after they...