Lars Anders Thorsten Kjellgren (19 October 1913 – 4 February 2006) was a Swedish Army officer.
Kjellgren was born on 19 October 1913 in Karlstad, Sweden, the son of Swedish National Bank director Torsten Kjellgren and his wife Elsa (née Sandwall).
[2] He served in the Life Regiment Grenadiers (I 3) in 1950 and was section chief at the Army Staff from 1950 to 1951 and became major at the General Staff in 1952 and attended the Swedish National Defence College in 1952.
Kjellgren was head of department at the Army Staff from 1952 to 1958 and was promoted to lieutenant colonel in 1957.
[3] In January 1961 he succeeded the Irish Colonel Byrnes as commander of the UN troops in southern Katanga.