Macaulay Culkin has 'unfinished business' with late Home Alone co-star Catherine O'Hara Home Alone actor Macaulay Culkin still feels he owes his late co-star and on-screen mother Catherine O'Hara "a favour", insisting her passing came "just too soon". 13 May 2026 Home Alone actor Macaulay Culkin feels like he has "unfinished business" with his late co-star Catherine O'Hara.