Live Aid founder Bob Geldof said his family was "beyond pain" at the death of his socialite daughter Peaches at the age of 25 on Monday.

Police were called to her secluded home outside Wrotham in Kent, southeast England, but she was pronounced dead at the scene. Her death was being treated as "unexplained and sudden" but non-suspicious, police said.

Peaches, a mother of two young sons herself, was just 11 when her mother, television presenter Paula Yates, died of a heroin overdose at age 41 in 2000.

In her last Twitter message to her 190,000 followers on Sunday, Peaches posted a photograph of her as a baby being held by her mother, with the words, "Me and my mum."

Her father Bob, who put together a huge live rock show in 1985 to raise money for the Ethiopian famine, said of his second daughter, "Peaches has died. We are beyond pain.

"She was the wildest, funniest, cleverest, wittiest and the most bonkers of all of us."

Singers Lily Allen and Ellie Goulding were among the first to pay tribute on social media.

"My thoughts are with Peaches' family at this awful time," Allen tweeted. "I hope they get to grieve in peace. Peaches, rest in peace gorgeous girl."

Singer Ellie Goulding added, "Even if you think you've got it all figured out, some things still can't be explained or understood. Two beautiful children. RIP Peaches."

Sharon Osborne later said it was "unimaginable" what the family was going through, while X Factor mogul Simon Cowell tweeted: "The few times I met Peaches she was a sweet, funny warm person. Much love to her family she has left behind."