Eurosport - Soualiho Meite (Imago)
The 18-year-old has put pen to paper on a four-and-a-half-year deal.
"It is with great pleasure that I sign for Lille, one of the largest French clubs," said Meite.
"I know how lucky I am to be here."
2010-11 champions Lille are 11th in the table while Auxerre, champions in 1995-96, are down in 12th in the second tier.
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