But Fincher cast Oldman’s manager, Douglas Urbanski (as Larry Summers in ’The Social Network”), before he called up Oldman about another role. Orson Welles was a genius and if everybody doesn’t know that, I don’t know what to say.”In crafting the portrait of Mankiewicz, Fincher wanted Oldman as himself. Oldman was himself once an alcoholic and, like Mank, prone to audacious gambles. Back when he was drinking, Oldman chose between two simultaneous offers — “Waterworld” and “The Scarlet Letter” — with a coin flip. In a court filing in 2001, Fiorentino alleged that Oldman hit her with a telephone, an allegation that Oldman strongly denies.