 When casting for the role of Donnies sister, it came to  Richard Kelly (II) (qv)s attention that Maggie Gyllenhaal (qv)  (who had few film credits at the time) would be available for the  shoot. The agent who proposed Maggie Gyllenhaals casting instantly  reminded Kelly of her scene in _Cecil B. DeMented (2000)_ (qv),  where she drank urine. Though Kelly was slightly hesitant towards  the idea, he did like the way she drank urine