A Downton Abbey veteran plays the title character based on Professor Xavier’s son.

Marvel announced Dan Stevens, Aubrey Plaza and Jean Smart (Fargo) have joined the cast of the pilot for Legion.

Here are the official descriptions of characters.

DAVID (Dan Stevens) – Diagnosed as schizophrenic at a young age, David is a haunted man, trying to find his way back to sanity, but he’s getting tired and is about to give up when he meets the girl of his dreams.

LENNY (Aubrey Plaza) – David’s friend, who despite a life of drugs and alcohol abuse, knows that any day now her life is gonna turn around, which gives Lenny the likeable energy of the impossible optimist despite her rough demeanor. Continue reading DOWNTON ABBEY Star Joins LEGION