Leonie Beck is a German open water swimmer, recognized for her achievements in national and international competitions, including multiple World and European Championship titles. After securing her first German national 1500m freestyle title in 2012, Leonie Beck quickly established herself as a formidable talent in competitive swimming, repeating the national title in 2013. During these formative years, she also earned a European junior title in the 1500m freestyle in 2012, followed by gold medals in the 400m and 800m freestyle events at the European Junior Championships in 2013. Beck made her Olympic debut at the Rio 2016 Games, competing in the 800m freestyle.

The year 2023 marked an extraordinary period for Beck at the Fukuoka World Aquatics Championships. She secured a gold medal in the highly competitive 10km event, finishing four seconds ahead of her closest rivals, a victory that simultaneously qualified her for the Paris 2024 Olympics. Just three days later, she achieved a historic double victory by also winning the 5km event, becoming the first swimmer since Larisa Ilchenko in 2007 to claim both the 5km and 10km world titles. Her dominance continued into 2024, where she secured two more gold medals at the European Championships in Belgrade, triumphing in both the 5km and 10km open water events, solidifying her position as a top contender for an Olympic title.