13. Keith Coogan as Kenny Crandell, Don't Tell Mom the Babysitter's Dead (1991)
In Don't Tell Mom the Babysitter's Dead, the Crandell kids are inadvertently left home alone for the summer when, you guessed it, their sitter croaks while mom is away in Australia. Eldest sibling Sue Ellen (Christina Applegate) resolves to take care and provide for everyone herself. Younger brother Kenny, unfortunately, is the least helpful. He's too busy getting stoned and embarking on the subsequent kitchen raid with his buddies to offer any kind of support.