Luiz Gustavo Dias (born 23 July 1987) is a Brazilian professional footballer who plays as a defensive midfielder for Ligue 1 club Olympique de Marseille. He began his career as a left back, but has played mostly as a defensive midfielder, and also as a centre back.
From 2007 to 2017 he played in Germany, where he represented 1899 Hoffenheim, Bayern Munich and VfL Wolfsburg, making 245 Bundesliga appearances and scoring 15 goals. He won six trophies in his time in the country, including the 2012–13 UEFA Champions League with Bayern Munich.
A full international with over 40 caps since his debut in 2011, Luiz Gustavo represented Brazil as they won the 2013 FIFA Confederations Cup and came fourth at the 2014 FIFA World Cup, both on home soil.