Born on 20 July 1993 in Meaux, Lucas Digne, a product of the LOSC youth academy, made his Ligue 1 debut with Lille during the 2011-12 season.
The defender imposed himself as the club's first-choice left-back in the 2012-13 campaign. He played in the UEFA Champions League and scored his first professional goal against FC Copenhagen.
French International since the U16s, Lucas Digne won the 2013 FIFA U20 World Cup in Turkey earlier this month.
Lucas Digne will wear the number 21 jersey.
"Lucas Digne, a rising star of French football and recent winner of the U20 World Cup, was the subject of transfer interest from a number of major clubs and has chosen Paris Saint-Germain to continue his progression on the European stage. We are delighted to welcome this young French player into our squad," declared Paris Saint-Germain President Nasser Al-Khelaifi.
"To play for Paris Saint-Germain, with these exceptional players, is a dream come true. I'm very happy. After the World Champion title in Turkey, I am having an incredible summer. I would like to thank the club for the confidence they have placed in me," added Lucas Digne.