The Kid (2000)

Russ Duritz (Bruce Willis) is a wealthy L.A. image consultant, but as he nears 40, he's cynical, dogless, chickless, and estranged from his father (Daniel von Bargen), and he has no memories of his childhood. One night he surprises an intruder (Spencer Breslin), who turns out to be an almost-8-year-old kid. There's something oddly familiar about the chubby lad, whose name is Rusty. The boy's identity sparks a journey into Russ' past that the two of them take--to find the key moment that defined who Russ is. Two long-suffering women look on with disbelief: Russ's secretary Janet (Lily Tomlin) and his lovely assistant Amy, to whom Rusty takes a shine. What, and who, is at the end of this journey?—