Share on Twitter
The Brazilian left-back takes on the leadership role from Sergio Ramos, who has left the Spanish giants to join Paris Saint-Germain, and said he felt "extremely lucky" to be chosen.
At the age of 33, Marcelo will hope to be a mainstay under Italian boss Ancelotti, who is back in charge at the Santiago Bernabeu after Zinedine Zidane left following a lack of silverware in the 2020-21 campaign.
It is Ancelotti's second crack at the Madrid job, after a prior spell covering two seasons from 2013 to 2015. Capturing the La Liga crown that Atletico Madrid snatched last term will be a priority.