Small Wonder (1985)

Father Ted Lawson creates a robot, VICI (played by Tiffany Brissette). The family--Ted, Joan and Jamie--keep VICI's identity secret, and pretend that she is their daughter. Harriet, their nosy and annoying neighbor, has a crush on Jamie and plans to marry him. Her dad, Brandon Brindle, is Ted's boss; Brandon stole credit for Ted's ideas.