Gwen Taylor is joiningas a straight-talking grandmother.
The actress will play Violet Highway, "who has no qualms about putting people in their place".
Taylor, known for, , and , said of signing up for the BBC One soap:
She will play Stuart and Callum's grandmother and arrives in Albert Square in the run-up to Ben and Callum's wedding.
The soap's executive producer Jon Sen added: "Having Gwen join the show is an honour, she's the perfect actress to play the multi-faceted Violet Highway, a grandmother not to be messed with. Stuart and Callum are sure to find this out the hard way when she arrives in Walford for Callum's big day and they'll no doubt be wanting her visit to be fleeting but Violet definitely has other ideas. We welcome Gwen to Walford and look forward to the audience watching her make her mark."
Taylor's first scenes as Violet Highway will air this spring.