Oscar nominee's gay affair?

From Gatecrasher:

Which unmarried Oscar nominee/heartthrob had an affair with a male wardrobe assistant on a recent project?

Um. What? Well, the full list of individual male Oscar nominees is after the jump; unmarried nominees are in bold font, unmarried heartthrobs are in red, bold font.

Philip Seymour Hoffman I think technically he is unmarried
Heath Ledger Technically unmarried
Terrence Howard Again, technically unmarried
Joaquin Phoenix
David Strathairn
George Clooney
Matt Dillon I'm pretty sure he's not married
Paul Giamatti - Did you know his dad used to be the president of Yale?
Jake Gyllenhaal
William Hurt