Catherine O’Hara as Kate McCallister
Kevin’s mom, Kate McCallister had sent him to sleep in the attic the night before they left for their big family vacation overseas. With a hectic morning, Kate doesn’t realize that no one woke up Kevin. They all got in the shuttles to the airport without even noticing.
Although a seemingly huge mistake, there is no doubt that Kate loves her son. The entire movie she spends on the phone and arranging transportation to get back to her son as quickly as possible. She proves she would go to any lengths for him, including unusual transportation like hitching a ride with a polka band.