Add Reese Witherspoon to the growing list of stars who are mourning the sad and unexpected death of actress Catherine O'Hara. As we've been reporting, the iconic actress and super-memorable Home Alone star passed away in Los Angeles on Friday. Her reps at the Creative Artists Agency later released a statement that O'Hara had died at her home in "following a brief illness." She was 71 years old. Ever since, stars who had the pleasure of working with the exceptional actress during her life have been stepping forward to deliver their tributes to Catherine.