Katie Holmes slipped into a LBD last night to check out her fellow Broadway stars at a performance of August: Osage County in NYC before heading back to rehearsals this morning. Tom and Suri didn't join her this time, but they're sure to be front and center on her opening night, and it sounds like there may be another familiar face in the audience too. When asked about checking her out on stage, her former costar and boyfriend Joshua Jackson said, "Of course! Of course!" While we'd love to see Tom and Katie on a double date with Josh and Diane, for now we're just happy to hear that the old Dawson's Creek kids are still so supportive of each other.