They had met on the set of John Hughes’ Ferris Bueller’s Day Off, and Grey was just weeks from becoming a household name following her role as Baby in Dirty Dancing.
According to People, the couple had flown to Northern Ireland for a romantic trip after their onscreen appearance as brother and sister in Ferris Bueller’s Day Off, when the pair decided to rent a BMW 316 to drive from Irvinestown to Maguiresbridge.
In the hours before the accident, Broderick, who was then 25, and Grey, who was 27, pulled into a petrol station to ask for directions. After being told their chosen route was "just stupid", an off-duty policeman offered to lead them to the right road.
Broderick declined the offer.
Shortly after, there was a huge downpour of rain, and the Hollywood couple decided to take another break at a petrol station. This time, they found their bearings and waited for the rain to stop.
Less than a mile from the petrol station, 80 miles west of Belfast, they collided head on with a car driven by a 28-year-old woman named Anna Gallagher.