The Brazil international, who joined from Fluminense in 2007, has committed his future to los Blancos for the next five seasons
Real Madrid have announced that defender Marcelo has signed a new contract binding him to the Santiago Bernabeu until 2020.
The Brazil international still had three years to run on his previous deal with los Blancos but has now decided to extend his stay in the Spanish capital for an additional two seasons.
Marcelo joined Madrid from Fluminense in January 2007 and has long since established himself as the club's first-choice left-back.
The 27-year-old has won three Liga titles during his time at the Bernabeu, while he also played a key role in the 2014 Champions League triumph, scoring a goal in the final against Atletico Madrid.
Marcelo, who missed Brazil's Copa America campaign with a back injury, becomes the second Madrid defender to commit his future to the club this week, with fellow full-back Dani Carvajal also having signed on until 2020 on Wednesday.
Former Madrid defender David Mateos has told that Marcelo represents an ideal candidate to become a team captain should Iker Casillas and Sergio Ramos depart this summer.