On August 5, 1987, Grey suffered severe whiplash in a car collision in Enniskillen, Northern Ireland, while vacationing with actor Matthew Broderick, whom she had begun dating in semi-secrecy during the filming of "Ferris Bueller's Day Off". The crash, the event through which their relationship became public, occurred when Broderick, at the wheel of a rented BMW, crossed into the wrong lane and collided head-on with a Volvo driven by a local mother and daughter, Margaret Doherty, 63, and Anna Gallagher, 28, who were killed instantly. Broderick was convicted of careless driving and fined $175. "Dirty Dancing" was released a few weeks after the collision, catapulting Grey to fame. But she has said that her grief and survivor's guilt over the crash prevented her from enjoying the film's success, and led her to withdraw from acting for some time.