She was the star attraction of the Gothenburg theatre and one of the most celebrated stage actors outside of the capital of Stockholm in her time.
Sophie Haglund was engaged at the Comediehuset in Gothenburg in 1810-16, and then, when it was replaced, at the new theatre of Segerlindska teatern in 1816-23; first under Johan Anton Lindqvist and (from 1820) under Gustaf Åbergsson.
After her role in Hittebarnet, it was said: Having seen her acting in this play, as well as that of Korsfararne, one can say that our stage has never, at least not for quite some time, possessed such skillfull actresses as Mrs Åbergsson and the mamsell's Haglund and Åberg;[1]Haglund was highly regarded particularly for her ability within tragedy, which was at that time given the highest status among the genres of acting: ...she is our only tragedienne, which was clearly demonstrated in »Korsfararne» and »Hittebarnet».
She owns the youthful weakness, the mild grace, the tender, almost melancholic expression, which belonged to the tragic actress.
As such she is noted to have performed at her old stage in Gothenburg again in 1830, when the city was visited by the Wildner company.