 He played in two matches, against England and Scotland in the 1963 British Home Championship, but failed to get on the scoresheet and only played for his country on one further occasion – an Under-23 international in 1964.With Manchester United, it was a similar story to his international career that followed for McMillan in 1962–63.He only made four appearances during the entire season, all of which came before Christmas, and he was unable to add to the six goals he scored in his first season.