Prospective parents everywhere, you have a new role model: Adam Sandler! In Big Daddy, Sandler plays 30-year-old bachelor Sonny Koufax, a carefree slob who has never much taken to adult responsibilities. However, as his old buddies start getting married and drifting away, Sonny realizes that if he doesn't do something soon, he could end up all alone for the rest of his life. When his most recent girlfriend dumps him because she's sick of being with a man who can't act like a grown-up, he decides that it's time to take drastic action to win her back. To convince her that he can face adult responsibilities, he adopts a five-year-old boy, Julian (Cole Sprouse and Dylan Sprouse). However, the plan doesn't work, and, as Sonny resigns himself to being single a bit longer, he makes a horrifying discovery: he can't return Julian, and now he really does have to start acting like an adult.