According to a recent report from Autosprint, Mercedes are set to confirm the 17-year-old ahead of his home race at the Italian Grand Prix.
Antonelli currently competes in F2 alongside Haas bound Ollie Bearman at Prema, where he achieved a sprint win at Silverstone and his first feature race victory in Hungary.
Not only has Antonelli impressed Mercedes bosses, but also the 2016 world champion Nico Rosberg, who has even gone so far as to compare the Italian to Verstappen.
“Antonelli just doesn’t have the car to show what he’s capable of in Formula 2,” Rosberg told Sky Sports F1.
“And we know that sometimes that is the case in the lower categories. So you need to get yourself there too in the good cars and so it’s a bit of a waste at the moment.
“So certainly it would be helpful if the move to something like Williams would be possible for him to really show what he’s capable of and also start building his confidence towards the possible move to Mercedes.”
“Kimi Antonelli raced in my go-karting team when he was a little kid,” the champion added.
“He’s phenomenal. He’s Max Verstappen-level. It’s really unbelievable.”