Look Who's Talking Too (1990)

Excited with the arrival of their new baby daughter, Julie, James, the cab driver, and Mollie, the accountant, will have to prepare Mikey for the role of big brother. Against the backdrop of rigorous potty training, heated arguments, and first and foremost, healthy sibling rivalry, both adults and children alike will learn that family is above all. Will Julie follow in Mikey's footsteps?