United Kingdom, Jan. 16 -- Teddi Mellencamp is "really sick" - months after she revealed her cancer had become "undetectable".

The 44-year-old TV personality's dad, singer John Mellencamp, shared the "suffering" his daughter is currently experiencing as she continues her battle with stage four melanoma - a serious type of skin cancer.

Appearing on a recent episode of the Joe Rogan Experience, John, 74, said: "I do have a daughter that's really sick. She's not f****** fine. She's got cancer in the brain. And she's suffering right now."

Teddi was diagnosed with stage two melanoma in 2022, and revealed in April 2025 that the cancer was at stage four after the disease metastasised to her lungs and brain, resulting in her having a 50-50 cha...