Millership's big chance in the Wednesday team came when it was decided to play him as a centre half towards the end of the 1932–33 season as a temporary replacement for the injured Tony Leach. Millership revelled in the central defensive position, his sturdy play earning him the nickname "Battleship" from Wednesday fans and by the end of 1933 he had made the position his own. He was Wednesday's first choice centre half for the next five seasons, playing in the 1935 FA Cup Final victory over West Brom and coming close to earning an England cap, playing in an international trial in March 1935.