Isla Fisher

Siblings Jemima and Jake Button don't know what to make of their new babysitter, Marge -- she's not tall enough to ride a roller coaster, and when she first appears on their doorstep, she looks very serious and is dressed like a grandma. But as soon as Mommy and Dad are gone, mischievous Marge lets down her rainbow hair, and the zany adventures begin. Jemima and Jake quickly learn that Marge's favorite thing is having fun, even if that means bending...