Sigurd Konrad Magnussøn (December 14, 1889 – November 12, 1961) was a Norwegian theater director and actor.
[1][2] On August 14, 1912 he married the actress Abigael Heber.
In 1921 and 1922 he also directed the experimental Intimteatret theater, where Agnes Mowinckel debuted as a stage director and Olafr Havrevold debuted as an actor.
Sigurd Magnussøn also appeared in a number of Norwegian films.
Both he and his wife Abigael starred in the blockbuster film Fant, which premiered in 1937.