The Nightingale String Quartet was founded in 2007 by violinists Gunvor Sihm and Josefine Dalsgaard, violist Marie Louise Broholt Jensen, and cellist Louisa Schwab.
The quartet won prizes at several national as well as international chamber music competitions. In June 2008 the Quartet won 1st prize at the Royal Danish Academy of Music scholarship chamber music competition. After playing together for only a year and a half, the Quartet won 2nd prize at the Danish Radio chamber music competition in February 2009. This was to be the beginning of a long succession of concerts in chamber music societies all over Denmark.
In April 2010 the Nightingale String Quartet was awarded 2nd prize at the international chamber music competition 'Charles Hennen Concours' in Holland. As a result of this prize, the Nightingale String Quartet was invited to take part in the summer course 'Orlando Festival' in Holland along with only 3 other prizewinning quartets. At the festival they received daily tuition from legendary violinist Shmuel Ashkenasi and played several concerts in the area. In 2011 the Quartet was awarded the Jacob Gade Major Scholarship and in 2011 the Léonie Sonning Music Foundation's Minor Music Prize.