A robot housekeeper grows more and more human-like over the course of his 200 year life. It is based on the 1992 novel The Positronic Man by Isaac Asimov and Robert Silverberg (which is itself based on Asimov's original 1976 novelette "The Bicentennial Man").

References:
https://en.wikipedia.org/wiki/Bicentennial_Man_(film)