Nancy Ann Olson is an American retired actress. She was nominated for an Academy Award for Best Supporting Actress for her role in Sunset Boulevard (1950). She co-starred with William Holden in four films, and later appeared in The Absent-Minded Professor (1961) and its sequel, Son of Flubber (1963), as well as the disaster film Airport 1975 (1974). Olson retired from acting in the mid-1980s, although she has made a few rare returns, most recently in 2014.

Sunset Boulevard is a 1950 American black comedy film noir directed by Billy Wilder and co-written by Wilder and Charles Brackett. It was named after a major street that runs through Hollywood.