A graduate of the Royal Academy of Dramatic Art, Marianne received Academy Award, Golden Globe and BAFTA nominations for her astonishing feature-film debut in Mike Leigh's "Secrets and Lies."
A writer and composer, Marianne wrote the score for Mike Leigh's "Career Girls." She has written and performed with British jazz musicians, including Jason Rebello, for whom she wrote and recorded four tracks on his album "Keeping Time."
Marianne recently co-starred on the hit ITV drama "Broadchurch," playing a role written especially for her by the show's writer and creator, Chris Chibnall. For seven years she co-starred on "Without a Trace," for which she and her cast were nominated for a SAG Award, and was nominated for an NAACP Award for three years in a row.