Derek Branning's son, who is called Joey Branning, is set to appear in Walford. He will appear to take his sister, Alice, home, on his mother's orders.
When Joey realises that Alice wants to stay put, he resolves to show her exactly the kind of man Derek really is.
Joey is to played by David Witts.
Witts commented: I am delighted to be joining EastEnders after being a fan for so many years. Joining the Branning family couldn't have come at a better time, especially after the recent British Soap Awards wins.
EastEnders' executive producer Lorraine Newman added: "Joey is a fantastic addition to the Brannings and after an explosive entrance onto the Square, he is set to break a few hearts as he campaigns to bring Derek down.