The 25-year-old midfielder spoke of his delight at joining from Sao Paulo, while the versatile Frenchman completes the move from Saint-Etienne
Lille have completed the signing of Sao Paulo midfielder Thiago Mendes in a move said to be worth up to €9 million, with Kevin Malcuit also arriving from Saint-Etienne.
Defensive midfielder Mendes has put pen to paper on a five-year contract with Lille and follows in the footsteps of Luiz Araujo, who left Sao Paulo for the Ligue 1 club in June.
Mendes won Brazil's Serie B with Goias in 2012 and, after two seasons in the top flight, moved to the Paulista giants and played a key role in their run to the 2016 Copa Libertadores semi-finals.