The Blues are looking to add to their strike force, despite Antonio Conte already signing Michy Batshuayi this summer.
Lukaku joined Everton in 2013 for £28.5million, and has netted double figures in the Premier League in all three seasons he’s spent at Goodison Park.
Last year was his highest tally with 18, and after the Toffees had a frustrating season, he is been heavily linked with an exit.
And now Chelsea are ready to bring back the Belgian, and are preparing a £50million bid to tempt him back to Stamford Bridge. Despite not being able to offer European football this season, Chelsea still believe they can offer more to Lukaku, even though Everton have new manager Ronald Koeman and are under new ownership.
Lukaku only played 10 Premier League games for Chelsea during his time for the Blues, failing to score.