Cates achieved icon status in 1982 for her popular girl role in Fast Times at Ridgemont High, particularly the topless scene in which she sheds her bikini top in a slow-motion fantasy sequence as Fast Times became a 1980s cult classic. That year, in the romance film Paradise, and in contrast to the coyness of Brooke Shields in the similarly themed The Blue Lagoon, Cates displayed copious nudity, although a body double may have been used in some of the close-ups. In a People magazine article, Cates said she had expressed reservations about this situation to her father, who advised her to play it in whatever way she felt was artistically and financially honest. She is quoted as saying "I was only 17 when I did my nude scenes in Paradise. They were serious and more difficult because they were not easily justified. But the topless scene in Fast Times at Ridgemont High was funny, which made it easy."

Her later film roles were more modest and largely oriented toward younger audience