The Ivory Coast international spent six years in the Premier League between 2006 and 2012, making over 250 appearances for Chelsea.
During his time at Stamford Bridge, Kalou won seven major trophies - including the Premier League title and the UEFA Champions League.
He left on a free transfer in July 2012 and enjoyed a productive debut season in France - netting 14 times in Ligue 1.
Kalou insists he is enjoying his time at Lille, but has admitted to missing the Premier League and claims there are clubs willing to bring him back.
He said: "There is some interest in me in England but, to be honest, I am enjoying my time at Lille as much as I can.
"However, it is not just my choice.
"West Brom are a very good club, with good players. The Premier League is attractive but I have a contract here."