​From Wikipedia, the free encyclopedia Inga Swenson (December 29, 1932 - July 23, 2023) was an American actress. Inga Swenson was a graduate of Central High School in Omaha, Nebraska, Class of 1950. Swenson was a member of Alpha Phi sorority at Northwestern University where she studied in their famed Drama Department. Swenson is best known to American audiences for her portrayal of Gretchen Kraus, the autocratic and acerbic German... see more