Dead Hollywood star Heath Ledger may have fathered a secret lovechild during a teenage affair with an older woman, his uncle has just revealed. Haydn Ledger, the estranged brother of the late actor’s dad Kim, claims the un-named 25-year-old woman discovered she was pregnant after her romance with the then-17-year-old Ledger ended.The woman in question was in a relationship with another man at the time.When the baby was born, it was presumed her boyfriend was the father, and he raised the child as his own.But Hadyn Ledger tells News.com.au, "There is a very real possibility that Heath was the father." Haydn fell out with Kim 20 years ago over the latter’s handling of their late grandfather’s estate.If the rumors are true; Matilda, Ledger’s two year old daughter with ex-fiancee Michelle Williams, would have to share his estate with a 10-year-old half brother or sister.Ledger died on January 22nd from an accidental overdose of prescription drugs at his New York City apartment.