Disney's The Kid (2000)

Bruce Willis stars as Russ Duritz, a successful image consultant whose life is suddenly turned upside down when he magically meets Rusty, Russ himself as an 8-year-old kid. Rusty is a sweet, but slightly geeky, awkward little kid who painfully reminds Russ of everything he hated about himself when he was a child-a pudgy, little cry-baby who was the daily victim of the school bullies-an image Russ has worked hard to overcome and consciously forget.