Lukaku, 17, burst onto the scene last season and was top scorer in the Jupiler Pro League with 15 goals in 25 appearances. His potential was also confirmed after he grabbed a brace in the 3-1 Europa League victory against Ajax.
A switch to the Stamford Bridge outfit has been mooted for several years, though they can expect to face competition from AC Milan, Real Madrid and Arsenal. Speaking to Sport/Voetbal Magazine, Belgian FA spokesman Nicolas Cornu divulged a conversation he had with Drogba about Lukaku.
"Yes, I've even called him," Drogba is reported to have said.
"I got his phone number from Vincent Kompany.
"I told him - you have to sign for Chelsea."