The TV personality and DJ, 25, who has sons, Astala, 23 months, and Phaedra, 11 months, with husband Tom Cohen, was found dead at their family home in Kent, England on Monday afternoon (07.04.14).
The 'Hard Out Here' hitmaker was among dozens of celebrities to express her condolences on Twitter, writing: ''My thoughts are with the Geldof's at this awful time. I hope they get to grieve in peace. Peaches, rest in peace gorgeous girl.''
TV personality Myleene Klass wrote: ''The news of beautiful Peaches is utterly devastating, God bless her babies. RIP mama xxx''
Topshop heiress and designer Chloe Green tweeted: ''Such sad news, my heart breaks for her beautiful children RIP Peaches, a wonderful soul, Let us all allow her family to grieve in peace''
'Burn' hitmaker Ellie Goulding wrote: ''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''
British singer Sam Smith tweeted: ''So so sad about Peaches Geldof. Thoughts with all of her family''
In her last message on Twitter on Sunday (06.04.14), she posted a picture of her as a child with her mother.
Her death is currently being treated as unexplained and sudden by police.