Al Pacino plays Connie Corleone’s brother Michael in The Godfather Part III.
Michael is the central character of the complete Godfather film trilogy. In Part III, Pacino portrays him as an older man attempting to move the Corleone family’s finances into legitimate businesses while coping with the consequences of his earlier decisions.
The film brings Michael into contact with the Vatican and the International Immobiliare corporation, and it places his family relationships under renewed pressure. His sister Connie, played by Talia Shire, has become more involved in family affairs by this stage of the story.
This question identifies Pacino by his relationship to Connie rather than by Michael’s title or plot role. Andy Garcia plays their nephew Vincent, while Robert De Niro plays their father Vito in the earlier timeline of Part II. John Cazale plays Fredo in the first two films.