Mindy Cohn opened up about her new cancer battle on Instagram. The actress, best known for her role as Natalie Green on the sitcom The Facts of Life and for voicing Velma in the Scooby-Doo cartoons for several years, shared a message of hope on the social media platform on Sunday, April 19. She posted a picture of herself in a hospital bed, smiling and giving the camera a hearty thumbs up. Mindy Cohn posted a picture of herself in the hospital. By: @mindycohn/Instagram "have been off social media for awhile ' cuz i had to go kick cancer's a**," Cohn captioned the post.