From the Hans Christian Andersen biography "The Life of Hans Christian Andersen. Day By Day", written by DPhil Johan de Mylius:
1821Debut as walker-on
HCA has his actual debut as walker-on (plays a "musician" in Gleottis' ballet Nina). Is made a choir student with no regular payment. In one year he was able to earn a total of 25 rdl. for his services at the theatre. The actor F. Lindgreen gives him private lessons, but advises him to give up the dream of becoming an actor.
At the suggestion of Høegh-Guldberg, HCA pays a visit to the newly appointed theatre director, Jonas Collin. But to no avail.