The prize, 300,000 kronor, is awarded for "technical and artistic brilliance in cutthroat European competition."
The award means "a lot" to Wallroth, the 26-year-old singer said in a press release.
"As an opera singer, you are competing with all of Europe, but just seeking work can be incredibly expensive and a financial risk."
The Mogren Prize in Music, which was founded by Astra's former CEO Håkan Mogren, is awarded to a young musician at the start of their career.
