Astrid Sommer (née Christiansen; 21 May 1906 – 9 April 1990) was a Norwegian actress who worked at the Det Norske Teatret for more than fifty years.

[1] Sommer was born in Kristiania on 21 May 1906, to Carl Christiansen and Agnes Mathilde Rosendahl.

Her breakthrough role was the character "Krestna" in Oskar Braaten's play Ungen in 1929.

Among her other characters were "Kvitugla" in Olav Duun's Medmenneske (several times between 1937 and 1976), "Maren Dokter" in Arne Garborg's Læraren (in 1943, 1948 and 1951), and "Smikkstugun" in Alf Prøysens Trost i taklampa (1952 and 1963).

Her films include Ungen (1938), Godvakker-Maren (1940), Trysil-Knut (1942), Trost i taklampa (1955) and Hans Nielsen Hauge (1961).