Cindy Junior will arrive on screen in August after deciding to spend the rest of her summer holiday on Albert Square. However, what the Beales don't know is that she has no intention of being sent back home to Devon when term starts.
Mimi Keene, whose previous credits include BBC One's Our Girl, has been cast in the role of Cindy Junior.
Show bosses have teased that Cindy Junior shares many similarities with her late mother, as she is not yet 15 and is already a magnet for trouble.
The schoolgirl relishes the attention that her bad behaviour brings, but deep down she is lonely. After spending time with her half-brother Peter (Ben Hardy) in Devon, she longs to be embraced by the family she should have grown up in.
Billed as "cheeky and hugely likeable", the mischievous teen has no fears or inhibitions and will shake up life for the Beales and the Square in general.
EastEnders' executive producer Lorraine Newman commented: "Mimi is an exciting addition to the show and a great actress as her previous work has shown.
"Cindy's a minx, creating a great energy within the newly-reformed Beale clan. With Peter, Lucy, Bobby and Cindy to contend with, it'll be a lively household - Ian and Denise will certainly have their work cut out."
Long-time EastEnders fans will know that Cindy Beale died in childbirth, so Ian decided to name the baby Cindy in her honour. Cindy Junior, whose father is businessman Nick Holland, then went to live with her grandma and aunt in Devon.
Cindy Junior previously appeared on screen as a baby in 1998, and also made a brief appearance in 2007 with Eva Sayer playing the part.
Digital Spy Soap Scoop video - press play below to watch Amie Parker-Williams reveal gossip on Tanya's EastEnders exit, the Coronation Street surrogacy plot conclusion, Emmerdale drama for the Dingles and a Hollyoaks teen spiralling out of control.