The Secret Garden star will next be seen in the hit BBC fantasy show.
There's a darker side to The Secret Garden that makes it an important story for families to tell.
Frances Hodgson Burnett’s novel The Secret Garden is widely recognised as a classic of English children’s literature, and has been adapted countless times, on stage, on television, and on film.
The film from Harry Potter and Paddington producer David Heyman, was initially slated for release in cinemas on 3 April.
The film comes from the producers of 'Harry Potter' and 'Paddington'.