The pair used some of their free time to catch up over video link on Puma's Instagram page.
Lukaku said to his old coach: "'I think, in the national team when you were there, I think for us the strikers we had maybe the best time we could ever had, because the competition was there.
"Everyone played at a high level, thanks to you. We constantly wanted to do better, outdo each other.
"And even you were joining in the competition! That was the funny part. You may have been retired, but it was not visible at times."
Henry admitted he sometimes could not resist the urge to show off his talents, and it's clear they had not waned during retirement.
Lukaku added: "I remember when my brother came and he was like you did this skill in training but I'm not going to say any names but the player left the pitch.
"'No don't!" Henry replied.
Lukaku continued: "Jordan [his brother and teammate] came to me and he said, 'Rom! I've seen some s*** today! Damn!' He was like, 'Damn man, that s*** was crazy!'"
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!