On 18 January 1773, she participated in the famous opera "Thetis och Pélée" by Francesco Uttini at the inauguration performance of the Royal Swedish Opera (as well as the Royal Swedish Ballet) in the role of Virtue opposite her personal friend Betty Olin (daughter of Elisabeth Olin) as Love. Carl Christoffer Gjörwell called her "as beautiful as a spring day" and noted: "Our new M.lle Slottsberg will become one of the greatest dancers in Europe, and never set foot in the theatre without the most constant applause from the Royal box."