June Whitfield is returning to EastEnders as Sister Ruth. Earlier this year, Kat arrived at the old convent where she gave birth to her daughter Zoe and unknowingly her son.
We were treated to an entire episode which delved back into Kat's past but Sister Ruth was keeping something back.
June will return to EastEnders at Christmas. She said: "I am so thrilled to be returning to EastEnders to revisit Sister Ruth and am really looking forward to working with Jessie Wallace again."
An EastEnders insider added: "Kat and Alfie are going to have a life-changing time back in The Square and Sister Ruth's involvement is going to be crucial.
"She holds the key to a big part of Kat's life, but are some things better off left in the past or will she confess her secrets?"
This will set the story for the pair to make their way to Ireland in search for answers.