Grethe Sønck was born on July 16, 1929 in Hjerm, Denmark as Grethe Ingeborg Nielsen Hald. She was an actress, known for Naboerne (1966), Peters jul (2006) and Olsen-banden (1968). She was married to Volmer Sørensen and Hjalmar Nikolausson. She died on February 12, 2010 in Rågeleje, Denmark.

Filmography