Megan Lacy Wren, actor Tom Sizemore's missing girlfriend, was once engaged to The Doors legend Robby Krieger's son, Waylon.
What's more, a family member said Wren is suffering from a heart ailment and needs treatment.
Cops in Los Angeles last week questioned Sizemore, who has a criminal record that includes domestic violence, about the March 31 disappearance near Sizemore's downtown Los Angeles loft.
At this point, he's not a suspect and has cooperated fully with investigators.
Georgiana Wren, the missing woman's grandma from Corona, CA confirmed that her granddaughter is a heroin addict, and the length of Megan's current disappearance -- more than six weeks -- has her grandma worried sick.
"She used to live with me after her mother and grand-father died and we were once close. But her drug addiction changed her personality," Georgiana Wren said. "I knew that she was working for Tom Sizemore."
- Johnny Depp's Longtime Pal, Legendary Rock N' Roll Guitarist Jeff Beck Dead At 78
- Prince Harry & Meghan Markle’s Tell-All Netflix Series Delayed To 2023 After Attacks On ‘The Crown’
- Dianne Feinstein Refuses To Retire Before Her Senate Term Ends In 2024 Despite Colleagues Arguing She Is 'Mentally Unfit To Serve'
Georgiana Wren added: "I'm pleased if (Sizemore) has helped because we are getting desperate now. (Megan) was living with a lady who lived beside Sizemore that is how they met, but her family has not heard from her since March.
"Her friends told us that she had not been well and suffered from a staph infection close to her heart, so, we need to try and find her as quickly as possible."