During the interview, Russell recalls his son acting in the film. "He had to audition for it, and he had to earn it," he tells the audience to laughter and applause. Cooper smiles, but De Niro's face seems to puff up with pride as though he's the child's father himself.
Russell's son has a real-life mood disorder similar to the one Bradley Cooper's character possesses in Silver Linings, and Katie asks De Niro if this gave him a greater responsibility than in his recent work.
De Niro, visibly moved at 5 minutes in, stutters in his speech and begins to cry. O. Russell then reveals this was De Niro's same reaction when he first showed him the screenplay.
Touching stuff.
Russell is up for Best Director, Cooper for Best Actor and De Niro for Best Supporting Actor at the Oscars. The film itself has been nominated for Best Picture.