Brazilian President Dilma Rousseff has arrived for a third inauguration of the stadium which will be used for the World Cup's opening game, despite the ground being still very much under construction.
Reporting from Sao Paulo, ITV News Brazil Correspondent Nick Ravenscroft tweeted:
He earlier pictured the current state of the city's stadium:
The inauguration comes as FIFA Secretary General Jerome Valcke led tributes to a worker who was electrocuted while fitting a telecommunications network at a World Cup stadium in Cuiaba.
Muhammad'Ali Maciel Afonso, 32, was the eighth person to have died while working on stadiums for the tournament.