Arthur Simpson-Kent has pleaded guilty to the murder of his partner, Sian Blake, and their two young sons.
His lawyer had previously revealed in April that Simpson-Kent had admitted to killing the former EastEnders actress, as well as 8-year-old Zachary Bilal Kent-Blake and 4-year-old Amon Ben George Kent-Blake.
Simpson-Kent appeared at The Old Bailey via video link from Belmarsh prison today (Friday, June 10), and will be remanded in custody ahead of a sentencing hearing, which is due to start on October 4.
PREVIOUSLY: EastEnders actress Sian Blake and her two children confirmed dead by Met Police
The bodies of Sian Blake, who played Frankie Pierre in BBC soap EastEnders in the 1990s, and her two young children were found concealed in the garden of their home in London.
A statement on the Metropolitan Police website reads: "Detectives investigating the triple murder of a mother and her sons from Erith, have today, Thursday, 7 January, confirmed that formal identification has taken place.
"They are Sian Blake, 43, Zachary Bilal Kent-Blake, aged 8 and 4-year-old Amon Ben George Kent-Blake.
"Sian's family are aware and are being supported by specially trained family liaison officers.
"This continues to be a fast moving investigation and our thoughts are with Sian's family at this time.
"We continue to appeal for any information that could help us trace Sian's partner Arthur Simpson-Kent. If anyone has any information about where he is or his movements since 16 December, then please get in touch with us.
"I would also like to ask anyone who may have seen Sian and her children, or who may have information about their movements since the last confirmed sighting on 13 December, to call us.
"This is now a murder investigation and as such I'd urge anyone who can help our investigation to contact us on 020 8721 4805."
WATCH: Sian Blake as Frankie Pierre in EastEnders
Scotland Yard have also made a renewed appeal to trace Sian’s partner, Arthur Simpson-Kent, who originally reported the disappearance of Blake and their two children on 16 December.
Detectives added that they are aware of reports in the media that Arthur Simpson-Kent has travelled abroad, but insisted that they need to speak to him “urgently” as "one line of inquiry".
“For operational reasons we are not prepared to discuss this further at this stage,” they added.
Arthur Simpson-Kent is described as a light skinned black man who is 6ft 2ins tall.
Police are asking anyone with information to contact them on 020 8721 4805 or Crimestoppers on 0800 555 111.