Russell The T says: "Michelle is one of the most sought after young actors in the country and we are delighted to announce that she will be joining the team."
She will apparently be playing a character called Lady Christina De Souza ( she's gone up in the world since Eastenders! ) with a "mysterious past" who's going to have "a huge impact on the Doctor."
Roll on Easter!
Soundtrack: rain beating down outside. Lovely.