Hannah Spearritt will appear in Eastenders for a brief stint later this year to play the role of Kandice, the sister of Karen Taylor.
The 36-year-old star will slot into the Taylor family as matriarch Karen's younger sibling and viewers will soon find out why.
Speaking about appearing on the show, Hannah said, "I'm over the moon to be joining the show, it's such a huge part of British telly.
"I'm really looking forward to getting started and I can't wait to see the square in the flesh...Walford here I come!"
The singer-turned-actress is the latest pop star to arrive on Albert Square following the casting of Blue's Lee Ryan as Harry "Woody" Woodward earlier this year.
Hannah has previously had starring roles as time-travelling zookeeper Abby Maitland in Primeval and, more recently, as Mercedes Christie in Casualty.
EastEnders airs on RTÉ One tonight at 7.30pm.