ABC News July 24, 2019

19-year-old Kristof Milak breaks Michael Phelps' 200m fly world record

WATCH: 19-year-old Hungarian breaks 200-meter butterfly world record

Michael Phelps’ 18-year-reign as the world-record holder in the 200m butterfly came to an end Wednesday.

Kristof Milak, a 19-year-old Hungarian swimmer, set a new record of 1:50.73 in the event at the world championships in Gwangju, South Korea, shattering Phelps’ time of 1:51.51, according to international federation FINA.

Yonhap/EPA-EFE/REX
Kristof Milak of Hungary in action during the men's 200m Butterfly Final during the Swimming events at the Gwangju 2019 FINA World Championships, Gwangju, South Korea, July 24, 2019.

FINA Swimming World Championships 2019, Gwangju, Korea - 24 Jul 2019

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Phelps, 34, clocked in with that time in 2009 at the worlds in Rome, but held the title since 2001.

"As frustrated as I am to see that record go down, I couldn’t be happier to see how he did it,” Phelps told the New York Times. “That kid’s last 100 was incredible. He put together a great 200 fly from start to finish.”

Hahn Lionel/Sipa USA via AP Images
Michael Phelps wins the Gold Medal in the 200m Butterfly at the 2016 Rio Olympic Games on August 9, 2016 in Rio De Janeiro, Brazil.
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Milak posted a video from the event to his official Facebook page, along with a “feeling happy” tag. He took home the gold medal from the event, in addition to setting the record.

Evgenia Novozhenina/Reuters
Swimming - 18th FINA World Swimming Championships - Men's 200m Butterfly Final - Nambu University Municipal Aquatics Center, Gwangju, South Korea - July 24, 2019. Kristof Milak of Hungary celebrates winning the 200m butterfly finals at the 18th FINA World Swimming Championships, July 24, 2019.

Daiya Seto, of Japan, came in second place at 1.53.86.