Macaulay Culkin is saying goodbye to his on-screen mom. As we reported, Catherine O'Hara passed away at the age of 71 on Friday. Her cause of death is unknown at this time. Tributes have been pouring in online since the news broke, and the latest? It comes from her Home Alone son. Related: Catherine Gave The Sweetest Speech For Macaulay Culkin At His Hollywood Walk Of Fame Ceremony Macaulay took to Instagram on Friday to post a picture of them together from the movie and his Hollywood Walk of Fame ceremony. He expressed in the caption: "Mama. I thought we had time. I wanted more.