Christopher Jullien is a French defender who plays for Celtic. He was born on 22nd March 1993. He is a product of the Auxerre youth system, but in 2013 after two seasons in the senior squad he moved to SC Freiburg in Germany. He only managed appearances for the reserve team before moving on loan to Dijon in Ligue 2. The centre-back starred as they won promotion to the top flight, not only playing 34 games, but by scoring nine goals from defence. That convinced Toulouse to sign him in the summer of 2016.