At the age of 15, she had already broken eleven Lithuanian women's swimming records. At the 2011 European Youth Summer Olympic Festival in Trabzon, Meilutytė won the gold medal in the 100m breaststroke, a silver in the 50m freestyle and a bronze in the 100m freestyle. At the 2012 Summer Olympics in London, Meilutytė won the gold medal in the women's 100 metre breaststroke with a time of 1:05.47. At age 15, she was also the youngest Lithuanian athlete to win an Olympic gold medal. In the semi-final she broke the European record in the 100m breastroke with a time of 1:05:21. In 2013 Meilutytė broke her own European record by 0.01 of a second.&lt;ref name="http://montecarlo-swimming.org"&gt;&lt;/ref&gt; Rūta competed at the 2013 World Aquatics Championships in Barcelona and achieved world records in the 50 and 100 metre breaststroke. At the age of 17 she became the first and the only swimmer in history to win all available junior and senior international swimming championships at least once.