At the time of his untimely death in January 2008, actor Heath Ledger was romantically involved -- in secret -- with Lindsay Lohan. So says her mother, Dina, in an undated, recorded phone conversation with Michael Lohan, her ex-husband and Lindsay's father.
 
In a newly revealed recording at Radar, Dina tells Michael that their eldest daughter "was dating Heath when he died . . . I don't know if you know that, but I know cause I would drop her off and they were friends, very, very close."
 
And Ledger's death devastated the actress, now 23. "That f***ed her up," her mother says.
 
Ledger died at age 28 on January 22, 2008 from an accidental, toxic combination of prescription drugs; he had recently separated from girlfriend, actress Michelle Williams, mother of their daughter Matilda, now 4.