death from breast cancer Sunday was a tragic end to her 29-year marriage to John Travolta, which bore three children: Ella Bleu, Benjamin and the late Jett, who died in 2009 of a seizure.Preston’s passing at 57 is, sadly, not the first time 66-year-old Travolta has lost a significant other to breast cancer.In 1977, actress Diana Hyland, who the actor had been seriously dating for a year, died of the very same cause.