Lithuania was given huge honor to organise the International Physics Olympiad in 2021. The Olympiad will be organised in Vilnius, the capital of Lithuania, on 17th–25th of July. We hope to welcome participants from more than 90 countries all around the globe with around 450 students and 300 leaders and observers. Approximately 220 Lithuanian physics, organizers and volunteers will do their best to welcome participants to this biggest celebration of physics. This Olympiad will be encouragement to learn physics not only for participant of the Olympiad, but also for Lithuanian students. It is planned that many different physics events will take place in Lithuania before IPhO.