Luigi "Lou" Macari (born 7 June 1949) is a Scottish former footballer and football manager. He began his playing career at Celtic where he was one of the 'Quality Street Gang', the outstanding reserve team that emerged in the late 1960s that also comprised Kenny Dalglish and Danny McGrain. He is best known for his time at Manchester United, where he played over 400 games. He helped them win promotion back to the First Division and then played in their FA Cup win of 1977. He then finished his playing career at lower league Swindon Town.