Kjerstin Dellert (4 November 1925 – 5 March 2018) was a Swedish opera singer and theater manager.

[2] Her career as a vocalist had begun when she won an Arthur Godfrey's Talent Scouts contest in 1948 with Someone to Watch Over Me.

[5] Dellert was also the initiator and producer of a few gala shows for particular celebrations, such as the show financed by Sweden's Parliament and given in 1976 at the Stockholm Opera for the wedding of King Carl Gustaf and Queen Silvia (where ABBA first performed Dancing Queen and she performed O, min Carl Gustaf)[6] and a review at Södra teatern for her own 50th birthday in 1975.

[7] At the latter, she summarized with a Swedish version of My Way, describing her own life till then with lyrics by Lars Jacob; the words were updated by him so that Dellert could use it for her last recording in 2015 for her 90th birthday, produced by Emil Eikner.

[1] 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 a critically acclaimed appearance as Maria Callas in the play Master Class by Terrence McNally at Confidencen and Lorensbergsteatern in Gothenburg.