Kjerstin Dellert is a Swedish opera singer and theater manager. Born in Stockholm, Dellert made her debut at Stora teatern in Gothenburg in the 1950s. From the mid-50s to the 1970s she worked primarily at the Royal Swedish Opera in Stockholm in a variety of opera roles, including Floria in Puccini's Tosca and Harry Martinson/Erik Lindegren/Karl-Birger Blomdahl's opera Aniara in 1959.
Dellert has also been the initiator and producer of a few gala shows for particular celebrations, such as the star-studded extravaganza financed by Sweden's Parliament and given in 1976 at the Stockholm Opera for the wedding of King Carl Gustaf och Queen Silvia. And an equally star-studded review at Södra teatern for her own 50th birthday in 1975.
Dellert is the Director of the Ulriksdal Palace Theatre Confidencen. Since the mid-1990s she has been retired from the stage, officially retired from the Swedish Royal Opera since 1979, but briefly in 2005 made an critically acclaimed appearance as Maria Callas in the play Master Class by Terrence McNally at Confidencen.