His career as a live singer touring the German language countries lasted until 1991, while he continued his television work until 1996.

Born in Vienna, Alexander attended the Max Reinhardt Seminar for actors until 1948 and then began his career in acting.

He starred in several musical comedies, including Liebe, Tanz und 1000 Schlager and Peter schießt den Vogel ab.

He recorded Ralph Benatzky's operetta Im weißen Rößl, singing the lead role of Leopold Brandmeyer.

The single "Und manchmal weinst du sicher ein paar Tränen" had the longest run with 34 weeks on that chart, while 2 other songs, "Der letzte Walzer" and "Liebesleid", were able to reach the No.