Diego Luna, more join the cast of Milk

Last week we noted that the cast of Milk (which at that point included Sean Penn, Josh Brolin, James Franco, Emile Hirsch, Victor Garber, Stephen Spinella, and Denis O'Hare) couldn't get any better. Well, it's a new week! Focus Features has announced that Diego Luna (Y tu mama tambien, The Terminal) has joined the cast of Gus van Sant's Harvey Milk biopic, playing Jack Lira, a troubled young lover of Milk.

It's also being reported that Lucas Grabeel, best known from his work dancing alongside Zac Efron in High School Musical, has been cast as Danny Nicoletta, another of Milk's supporters who also worked in Milk's San Francisco camera shop. Meanwhile, Big Love's Douglas Smith has been cast as Milk supporter Paul Hogarth.