The film is directed by 2020 Oscar winners Martin Desmond Roe and Travon Free, who made Two Distant Strangers, a film about African-Americans who died at the hands of police.

What Agnes Saw chronicles the remarkable life of Keleti, who fled Nazi persecution during the Second World War and won five Olympic gold medals after her 30th birthday, an astonishing feat in gymnastics.

"Agnes reminds us of the true power of resilience," the IOC's digital engagement and marketing director Christopher Carroll said.

"Agnes's story serves as a reminder to us all of the power and the voice of the Olympics.

"She is proof that you can experience the worst aspects of humanity and, against all odds, rise above it."

"This film, and the Stronger Together campaign overall, have been a chance for us to renew and bolster our connection with fans around the globe and remind them of their own inner resilience."

Keleti celebrated her 100th birthday in January this year and received a congratulatory call from IOC President Thomas Bach as part of the festivities.

In the film, narrator Danai Gurira asks: "In her century, what did Agnes see?

"Agnes saw a light. A light that helped illuminate the entire world."

Born Agnes Klein in 1921, she was a promising gymnast in Budapest before the outbreak of war.

She lost her father and other members of her family in the Auschwitz concentration camp, and was forced to hide out in the Hungarian countryside and adopt a false identity.

Keleti eventually found refuge with the help of Swedish diplomat Raoul Wallenberg.

After the war, she resumed her gymnastics career but injury prevented her from competing at the London 1948 Olympics.

In 1952, she won the first of her gold medals on the floor and returned home from the Helsinki Olympics with a gold, silver and two bronze medals in all. 

Four years later, as the Hungarian Uprising erupted in Budapest, she was able to escape the capital and travel to Melbourne where she won four gold medals and two silver, inspiring her team-mates with her own performances.

The late Prince Philip, Duke of Edinburgh, born in the same year as Keleti, made a special request to see an exhibition routine by her and the Hungarian squad when he visited the Games.

Keleti later sought asylum and emigrated to Israel where she became a revered national coach.

At 35, she had been the oldest gymnast ever to win Olympic gold.

The film tells how she sees a "new generation full of hope running towards their century, a generation who knows together we are stronger than the darkness can ever be".

It concludes with images of skateboarder Brown, who is set to become the youngest Summer Olympian to represent Great Britain here.

She will be 13 years and 10 days old when she competes in Tokyo, with the identity of the youngest Olympian, a rowing cox in 1900, remaining a mystery.

"The video juxtaposes the wisdom of age with the passion of youth to offer a light in the darkness and remind us of the moments of hope and inspiration that occur when the world comes together for the Olympic Games," the IOC said.