Swedish composer and professor, born 21 August 1957 in Essinge parish in Stockholm.

She is one of Sweden's best-known and widely performed composers. With regular performances throughout Europe, USA and Scandinavia, her range extends to chamber, orchestral, stage, and vocal music. Above all, she enjoys working with unusual, cross-genre forms and ensembles. One strong characteristic feature of her work is her exploration of the areas between art and folk music. Both elements are integral and never merely used for effect or as a nostalgic element. In particular, Rehnqvist has explored the extraordinary and dramatic vocal technique of Kulning.