is a Brazilian professional footballer who plays as a defender for Campeonato Brasileiro Série A club Fortaleza. He is primarily a centre-back, but has also been deployed as a defensive midfielder. He is widely regarded as one of the best defenders of his era.

After starting out at Vitoria, David Luiz moved to Benfica, remaining with the club for five seasons (three complete). He joined Chelsea in January 2011, winning the UEFA Champions League during the 2011–12 season. In the following season he won the UEFA Europa League. In June 2014, he transferred to Paris Saint-Germain for a fee of £50 million, at that time a world record transfer for a defender, and won all four domestic competitions over his two seasons in French football. During his time in France, Luiz was selected in the FIFPRO Men's World 11 in 2014. He returned to Chelsea in August 2016 in a £30 million transfer deal, winning a Premier League and second Europa League title. He transferred to local rivals Arsenal in 2019 before returning to his home country to play for Flamengo in 2021.

David Luiz made his full international debut for Brazil in 2010 and has since earned more than 50 caps for his country. He was a member of the Brazilian teams which won the 2013 FIFA Confederations Cup and reached the semi-finals of the 2014 FIFA World Cup, and has also represented his nation in two editions of the Copa América.