Keepin' it in the family! In the new issue of Redbook, Lauren Graham reveals that she is dating her Parenthood costar and onscreen sibling Peter Krause. "I've been really protective of it, because it's important that you can buy us as brother and sister on the show," she says. Of course, Krause isn't the only Six Feet Under alum to dally with a TV sibling, as Michael C. Hall famously married his Dexter sister Jennifer Carpenter. How long do you give it before Rachel Griffiths starts dating Matthew Rhys? [Redbook]
