Grethe Sønck (16 July 1929 â 12 February 2010) was a Danish actress and singer. She was born as Grethe Ingeborg Nielsen Hald in Hjerm, near Struer, but she changed her surname to Sønck in 1968. In 1946, she won a talent contest, and in 1947, she became a singer at the Restaurant Sommerlyst at Dyrehavsbakken. As a revue actress, she started in Cirkusrevyen at Dyrehavsbakken in 1962, and later came to Nykøbing Falster Revue.