Before attending Lee Strasberg Theatre and Film Institute he attained a BSc in Computer Science from Royal Holloway, University of London and has graduated from IV Belgrade Gymnasium before that.

[1] Other than acting, Aleksandar has been involved in many different sports, including soccer (at FK Rad youth team and later University of London All-star team), he also had a STARS (Student Talented Athlete Recognition Scheme) scholarship at Royal Holloway; He practices Shotokan Karate, in which he trained with Masataka Mori and James Field, he holds a black-belt; aikido, in which he trained with Mirko Jovandić and Yoshimitsu Yamada; XMA (eXtreme Martial Arts), with Mike Chat; and quite a few other sports, including snowboarding, waterskiing, ice-skating, horseback riding, sky-diving, volleyball, tennis, speedboat, jetski, motorcycle and car racing.

[2][4] Known for his humanitarian attitude, Aleksandar is a member of the Red Cross, where he is a lifeguard and was involved in multiple rescue operations during the catastrophic 2014 Balkan floods.

[5][6] Before moving to New York to attend the Lee Strasberg Theatre and Film Institute, Aleksandar was a member of Mika Aleksić's acting studio (Thing of the Heart) in Belgrade.

At Lee Strasberg he studied under many renowned acting teachers, including Hope Arthur, George Loros, Paul Calderón, Robert Ellerman, Anna Strasberg, Irma Sandrey, Geoffrey Horne, Ted Zurkowski, Pennie DuPont, Jeffrey Ferguson, Bruce Baumer, Jan Douglas, Chris Lutkin, Michael Ryan, Kohli Calhoun, John van Wyden, Allen Suddeth, Robert Castle and Richard Larson.