She was recognised as the oldest cat in the world by the Guinness Book of Records on May 19.
Her owner, 43-year-old Jacqui West is said to be devastated at the loss of her beloved moggy.
She told the Mail Online: ‘We knew she was old but it’s still very upsetting.’
‘She had a bad week last week. She was on antibiotics on the Wednesday because of a water infection and her back legs just seemed to let her down. She wasn’t herself at all.’
‘She passed away on Friday at 3.30pm. I had spent the whole day with her as she was particularly poorly.’
She added, sadly: ‘We knew it was going to happen but we’re all still completely devastated. It’s only just starting to sink in.’
Jacqui thinks that Poppy was waiting to be crowned the world's oldest cat before deciding to finally let go.
‘It’s great she managed to get the world record beforehand, it’s almost like she was purposely hanging in there because the process took months.’
‘We’ve buried her in the garden now, alongside all of the other pets we’ve had that have passed away.’
‘All of us are off food, the other cats didn’t eat all day on Friday and they all seem to be loitering around waiting for Poppy to come home.’
‘I think it is going to take us a little while to come to terms with it - it’s very said.’
The oldest cat in history, named Cream Puff, lived to the age of 38.