Sadie Young to be joined by daughter Bella
Child actress Isobelle Molloy has been cast in the role and has already filmed her first scenes for the BBC soap.
Bella will make her first appearance on October 17, and is expected to reappear later as beauty salon owner Sadie, played by Kate Magowan, features in major storylines, reported Digital Spy.
Isobelle, who previously appeared on stage in the West End production of Matilda, will star in Disney's upcoming Maleficent, where she will play the younger version of Angelina Jolie's character.
Kate first stepped foot in Albert Square on August 5, as she took over as the owner of EastEnders' beauty salon.
The actress has already teased there is 'a lot more' to her character than it first appears, saying: "I'm thrilled to be joining EastEnders and look forward to seeing what the character of Sadie will get up to in Walford."
EastEnders' former executive producer Lorraine Newman added: "Sadie plays as hard as she works, creating friendships and admirers in her wake. As the autumn unfolds, we'll soon realise that there is far more to Sadie than simply meets the eye."