Valda Joanne Hansen (November 3, 1932 – July 21, 1993) was an American actress, known for her performances in a number of B-movies in the 1950s and 1970s.
Her most famous role was that of the White Ghost in Ed Wood's Night of the Ghouls (1959). She had previously played a stripper in Strips Around the World (1955). She returned to the screen in the 1970s and appeared in movies such as Cain's Cutthroats (1971), Slaughter's Big Rip-Off (1973) and Wham! Bam! Thank You, Spaceman! (1975, in which she was credited as "Zelda"). She also appeared in a 1992 documentary about the filmmaker Ed Wood entitled Flying Saucers over Hollywood: The 'Plan 9' Companion.
Hansen first came across Ed Wood in 1957 at a local theater production. Impressed with what he saw, Wood asked her to think about a role in Revenge of the Dead. She accepted the role which was that of a ghost. He also got her to bleach her hair for the role. The film was later released as Night of the Ghouls
She played the part of Sister Ann in the biker film, Outlaw Riders which was directed by Tony Huston.
Hansen retired from acting around 1975, and died in Hollywood on July 21, 1993, aged 60, from cancer.