The partner of ex-EastEnders actress Sian Blake has been charged with murdering her and their two children, police said.
Arthur Simpson-Kent, 48, was detained by Metropolitan Police officers at Heathrow Airport after arriving on a flight from Ghana, from where he was extradited.
Ms Blake and her sons Zachary, eight, and four-year-old Amon vanished on December 13 and were found buried in the garden of their family home in Erith, Kent, on January 5.
Simpson-Kent has been taken to a west London police station. He was due to appear at Westminster Magistrates' Court on Friday afternoon.
Ms Blake and her children were found buried in the garden of the family home.
Simpson-Kent was arrested in Ghana having left Britain days after Blake and their sons Zachary, eight, and four-year-old Amon were reported missing on December 13.
They were later found buried in the garden of the couple's home in Erith, Kent, on January 5.
A post-mortem later revealed the three died from neck and head injuries.
The back garden of the family home was only thoroughly searched in early January after murder squad detectives had been called in to take over the case.
The Metropolitan Police is under investigation by the police watchdog for the way it handled the missing persons inquiry and why it took more than three weeks to find the bodies of Blake and her sons.
Ms Blake played Frankie Pierre in 56 episodes of EastEnders between 1996 and 1997. She was suffering from motor neurone disease before she died.