The classic ‘80s comedy Ferris Bueller’s Day Off made true movie stars out of Matthew Broderick and Jennifer Grey, but it was also the beginning of a Hollywood romance that would thrive in secret and end in tragedy. MirrorThe couple felt an attraction on the film’s set, but kept their relationship out of the public eye. At 25, Broderick had quickly become one of the decade’s biggest stars with a string of hits including WarGames, Ladyhawke, and finally Ferris Bueller. Grey, 27, had stood out in Red Dawn, but playing Ferris’s sister Jeannie really made her