The 2024 Paris Olympics are underway.

Hungary’s Kristóf Milák has thrilled home fans by lowering his own world record in the men’s 200 butterfly at the swimming world championships.

Hungary’s Kristóf Milák has set a world record in the men’s 200 butterfly at the swimming world championships.

Tatjana Schoenmaker knocked off the first individual world record in swimming at the Tokyo Olympics.

Team USA's Caeleb Dressel broke the Olympic record in the 100m butterfly for his third Tokyo gold.

Kristof Milak is the dominant force in swimming's butterfly event and the man who broke Michael Phelps' 10-year-old world record in the 200-meter fly at the world championships in 2019.

Finally, a gold medal in Tokyo for Katie Ledecky.

Catch up on the action from the Tokyo Aquatics Center on Day 5 of swimming at the Olympics.

Hungary's Kristof Milak grabbed gold in the men's 200m butterfly -- in an Olympic record-worthy 1:51:25.

Get primed for swimming on Day 4 of the Tokyo Olympics with the top storylines to follow from each event.

Clive Rose/Getty Images(CNN) - Americans Regan Smith and Caeleb Dressel claimed two of the five individual swimming world records that were set this week at the world championships in Gwangju, South Korea. The first of Phelps' records was broken by Hungarian swimmer Kristof Milak, 19, in the 200-meter butterfly with a time of 1:50.73, beating Phelps' 1:51.51 from Rome in 2009. Dressel, 22, broke the second of Phelps' records with a time of 49.50 in the 100-meter butterfly, topping the 49.82 Phelps also swam in Rome in 2009. The trend continued when Smith, 17, broke Missy Franklin's world record in the 200-meter backstroke with a time of 2:03.35. Phelps' lone individual world record left standing is the 400 meters in the individual medley.