Born in
Vejle, after matriculating from high school, Dehlholm studied
textile arts at the
Werkkunstschule (Arts and Crafts School) in
Krefeld, Germany. She spent the next three years at
Kunsthåndværkerskolen in
Copenhagen. In 1969, she married the writer
Otto Sigvaldi who sold his books from a pram in central Copenhagen dressed in the fanciful costumes she had designed. Some of her works include mirrored images and optical illusions. Her
Terra Australia Incognita (National Museum, 1989) inspired by voyages of discovery put the viewer in the unusual position of gaining a bird's eye view of the actors lying below. Her
Hvorfor blir det nat, mor? (Why Does it night come mother,
Aarhus City Hall, 1989) where the audience was standing on balconies looking down on the white floor where the performers performed. In 2015 she was awarded with the distinguished Artist Award for the Performing Arts (ISPA) as well as the Danish Honorary
Reumert Award of the Year. Dehlholm died on 10 July 2024, at the age of 79. ==Awards==