United go to Stoke this weekend.
Lukaku, 24, has three goals in three games already this season.
Hughes, 53, said: “He's the real deal. He's ready to go.
“I tried to get him at QPR when I was manager but he ended up going to West Brom on loan from Chelsea.
“I didn't pitch it too well! Probably because I didn't say he'd play week in week out."