Steve Martin and Bonnie Hunt return as heads of the Baker family who, while on vacation, find themselves in competition with a rival family of eight children, headed by Eugene Levy,

The Baker brood moves to Chicago after patriarch Tom gets a job coaching football at Northwestern University, forcing his writer wife, Mary, and the couple's 12 children to make a major adjustment. The transition works well until work demands pull the parents away from home, leaving the kids bored -- and increasingly mischievous.

Admiral Frank Beardsley returns to New London to run the Coast Guard Academy, his last stop before a probable promotion to head the Guard. A widower with eight children, he runs a loving but tight ship, with charts and salutes. The kids long for a permanent home. Helen North is a free spirit, a designer whose ten children live in lovin...

A coming-of-age story centered around a small-town singer brokenhearted by the death of her brother in a car crash, who had secretly submitted her for a summer session at a performing arts academy in Los Angeles. In the academy, she experiences a whole new way of life in the big city, far from the small town lifestyle she's used to.

When a widower with ten children marries a widow with eight, can the twenty of them ever come together as one big happy family?