Arguably, she is best known for her performance as the seductive, swinging housewife Elvira in the Radley Metzger film Score (1974).
Wilbur was a member of the original off-Broadway cast of Score, which was later adapted into Metzger's film.
According to newspaper articles published by Margaret Caldwell,[1] Wilbur's longtime close friend, the actress only accepted the part in the film version of Score to make enough money to produce a documentary short written and directed by her friend Robin Lehman.
[1] Wilbur also co-produced Lehman's shorts The End of the Game (1975) and Nightlife (1976), earning an Academy Award nomination for the latter and winning an Oscar for the former in 1976.
Wilbur was diagnosed with lung cancer in 2003 and died peacefully in her Upper East Side apartment in Manhattan on May 20, 2004.