Aleksandar Hecl started to draw at an early age and by 13 he was already called "The Wonderkid from Zemun" by newspaper Vreme. He broke off his studies in Fine Arts in 1951 to devote all his time to his career in illustration. During a period of more than forty years he created a great many illustrations, comics and paintings. He contributed to magazines like Pioniri, Mladost, Zmaj, Kekec and Yu Strip.
Among his comics were 'Zemljo, do viđenja', 'Letimo na Mesec', 'Otmica u vasioni' and 'Špijun na Radnagu', four science-fiction stories written by Dragoljub Jovanović in the 1960s. His final comics work was the Serbian fantasy classic 'Faet' in 1984.