Bob Geldof's daughter Fifi Geldof has been taken ill with pneumonia. The 31-year-old shared a photograph of herself on picture-sharing site Instagram looking poorly and described the range of serious symptoms she is currently suffering from.
"So it's not winter flu as I thought," she wrote, before adding she has "viral pneumonia".
Sir Bob's eldest daughter was then sent messages of support, with some saying she needs to go to hospital.
Pneumonia is the swelling of the tissue in one or both of the lungs and is usually caused by an infection.
Last month Fifi was obviously feeling in fine form, as she stepped out to support her dad at the special re-recording of the classic Band Aid track Do They Know It's Christmas?. She was also accompanied by her younger sister Pixie.
The pair looked happy and relaxed as they made their way into Notting Hill's Sarm Studios in London to join the likes of One Direction, Ed Sheeran, Rita Ora, Paloma Faith, Sinead O'Connor and Chris Martin for the recording.
Peaches Geldof's sisters have also lately been supporting their brother-in-law Thomas Cohen. They are reportedly helping their late sisters' husband to raise his sons Astala and Phaedra following their mother's tragic death in April.
Thomas and his sons now live with his parents in South London as he is reportedly too heartbroken to return to the house he shared with Peaches in Kent.
Peaches' three sisters Fifi, Pixie and Tiger Lily are said to be regular visitors to the house, as they help to care for their nephews and support their brother-in-law.
A family friend told The Mirror: "It's really impressive how the sisters have taken on the role of caring for the boys. Peaches would be so proud.
"Fifi, Pixie and Tiger have been amazing with the kids and such a help to Tom."