We have "evidence" that Anthony Hopkins played Gwyneth Paltrow's dad in this film of a Pulitzer prize-winning play
The beauty of Proof, which is based on a Pulitzer Prize-winning play, lies not 
so ... Gwyneth Paltrow as Catherine; Anthony Hopkins as Robert; Hope Davis as
... [DOC] [TLE] Movie 'Proof' is less about math and more about faith, credibilty and ... [PAR] Oct 14, 2005 ... Based on David Auburn's Pulitzer Prize and Tony Award winning play of the 
same name, the film version, like many stage ... by the performances of Jake 
Gyllenhaal, Anthony Hopkins, and especially Gwyneth Paltrow ...