Carlo Kalajzic was born on June 6, 2009, in Bavaria. Already in childhood, he showed a strong passion for acting and began appearing in front of the camera at an early age. His natural charisma and talent quickly helped him secure roles in renowned productions.

Kalajzic celebrated his breakthrough in 2020 with a role in "Tatort: ​​Die Nacht gehört dir," an episode of the renowned crime series Tatort. Here, he portrayed the character "Stefan Kamann," a performance that earned him much critical acclaim. The following year, he played the role of "young Moritz" in the drama Hannes (Film)|Hannes (2021). The film, based on the novel of the same name by Rita Falk, received positive critical acclaim and helped establish Kalajzic as a rising talent.

In addition to his film and television roles, Carlo Kalajzic has appeared in various advertising campaigns. He worked for well-known brands such as Lego, Hipp, and Zalando, expanding his fame beyond acting. His youthful charm and professional demeanor made him a sought-after figure in the advertising industry.