Hollywood's new Spider-Man is currently making his New York stage debut in a production of the Arthur Miller classic opposite Philip Seymour Hoffman.
The British actor's Broadway debut has been marred by sickness but he has refused to cancel a single show.
He tells the New York Times, "I couldn't (call in sick)... I'd feel much worse missing a performance than doing it while I'm sick."
The play's director Mike Nichols has also praised The Social Network star for being so determined, adding, "He can do it because he has an iron will and because he's an artist."