Beginning in 1981, Ms. Carroll appeared in numerous television shows and movies. But she probably never made a bigger impression than in the sleeper hit "Risky Business." In the movie, she plays Tom Cruise's bourgeoise suburban mother, who offers an endless stream of lightly scolding advice to her son before she and her husband go on vacation. She returns at the end of the film, having no inkling that her home has functioned as a highly successful brothel in her absence.