"Mama. I thought we had time," is how the actor began his Instagram post to O'Hara.

Actress and comedian Catherine O'Hara, who starred in "Home Alone," "Beetlejuice," "Schitt's Creek" and "The Studio," has died. She was 71.

Catherine O'Hara, a gifted Canadian-born comic actor and "SCTV" alum who starred as Macaulay Culkin's harried mother in two "Home Alone" movies and won an Emmy as the dramatically…