British actress Emily Watson is set to star in the upcoming Stephen Hawking biopic.

The War Horse star is joining fellow Brit David Thewlis and Les Miserables actor Eddie Redmayne in Theory of Everything, a film documenting the renowned physicist's relationship with his wife Jane Wilde.

It has not yet been announced which character Watson will play in the anticipated biopic directed by James Marsh, but production has already started in the U.K.