Lennox Lewis showed he hasn't lost his lightning-quick hand speed even at the age of 56.

The former undisputed heavyweight world champion retired from boxing in February 2004 following back-to-back KO victories over Mike Tyson and Vitali Klitschko.

Born to Jamaican parents in London, Lewis' diverse upbringing inspired the creation of his charity - The 'Lennox Lewis League of Champions Foundation'.

The foundation provides boxing lessons to young people from economically disadvantaged backgrounds to help improve mental and physical health.

JUST IN: Tyson Fury future: Eddie Hearn refuses to rule out signing the Gypsy King

The free summer camp for children aged between 8-11 ran for two weeks until the end of last month on July 31.

And Lewis proved that Father Time hasn't completely taken away his impressive hand speed on social media earlier this week.

On Monday night, the charity shared footage of Lewis regularly beating a younger boxer to the punch on the heavy bag to Twitter.

WATCH: Lennox Lewis shows he hasn't lost his lightning-quick hand speed at the age of 56

Check out the video below...

What was more impressive than the 56-year-old's insane reflexes was the fact he was far quicker than the youngster who was training next to him despite their considerable age gap.

The video's accompanying caption read: "Summer days at boxing camp with Lennox Lewis."

Lewis is currently on holiday in Jamaica where he is spending some time with his family.

He told local news outlet The Gleaner: “The boxing camp I run in Hanover is, for the most part, geared towards young men.

“The boxing camp always gets the excitement of children wanting to learn the sweet science of boxing, and every boxing skill level is represented here at the camp.

READ MORE: Oleksandr Usyk vs Anthony Joshua 2: Eddie Hearn says AJ is under pressure for rematch

MORE: Hasim Rahman Jr hits back in war of words with Jake Paul after being called 'stupid'

“It has been great to watch from the sidelines the growth of Jamaica in its tourism and entertainment. And I particularly go to all the major concerts in Jamaica.

“I enjoyed night one of Reggae Sumfest, but I felt as though I had seen a couple of acts twice. I was a little disappointed because of that, artistes sounding the same. Still, Ding Dong came on – he was good – and he does his thing.

"Spice’s letter to the prime minister was interesting, and I love that and also that she got crowned, but I wanted it to be filled with more diversity.”