Jonas Hämmerle was born on 4 January 1998 in Ditzingen-Heimerdingen. With his parents and his three older siblings, he lives in Berlin. There he attends the 6th Class of a German-American school.In his spare time he practices a lot of sport. He plays tennis and dances in a Jazz-Dance group. For a long time, he also practised gymnastics and Tae Kwon Do. Another passion is the music. At school, Jonas plays the cello in the orchestra and trumpet in a band.He reached film through his sister. She had the idea to apply to a children's casting agency. He quickly got the chance to play in a TV commercial for a car manufacturer. There followed his first leading role in the family drama Vater aus Liebe (2008). In 2008, he made his cinema debut appearing with Oliver Korittke and Michael Roll in the fantasy movie Das Morphus-Geheimnis (2008).