More bad news for SYLVESTER STALLONE – his half-sister Toni-Ann Filiti has passed away after battling lung cancer.

According to a close family member, Toni-Ann was battling stage four lung cancer.

After spending some time in the Intensive Care Unit, Filetti moved in with their mother, Jackie Stallone, during her final days, reported.

"She passed away last night and it was somewhat expected," the insider revealed.

"After being in the ICU she decided she wanted to die in the house so she could spend time with her family."

Last month, Sylvester's son, Sage Stallone, 36, was found dead in his apartment – leaving the 66-year-old Expendables star with two tragedies within months.