Eastenders executive producer Dominic Treadwell-Collins has revealed that not even the cast of the soap are currently aware of the identity of Lucy Beale's killer.
He said: "The killer doesn't know who they are yet, that's the truth. But they will be told about a month before."
The identity of the killer is set to be revealed during the show's 30th anniversary week of live specials in February according to Treadwell-Collins.
The last time Eastenders staged a live episode it was for the 25th anniversary when it was unveiled that Stacey Slater killed Archie Mitchell on Christmas Day.
Lucy Beale was killed off back in April after Hetti Bywater spent 2 years in the role.
The storylines during the anniversary week are set to focus on some of the show's oldest characters including Ian Beale and Dot Cotten.