Meet the Young Walkers: Joe Jonas to Guest Star on Brothers & Sisters

Did you ever think to yourself: That Joe Jonas sure bears an uncanny resemblance to Balthazar Getty?
No? Well, apparently, the producers over at Brothers & Sisters have, because, although there's no official word yet from ABC, inside sources tell me Joe will be playing a younger version of Balthazar's character, Tommy, in a two-episode flashback arc that focuses on the history of the Walker family.

So who else has been cast as the other Walkers? Well, you'll never guess who Rachel Leigh Cook is in contention to play...
A young Nora Walker, aka Sally Field.
According to sources on the show, Cook has auditioned for the role, but no final decision has been made on young Nora's casting. Also in the running for Nora are Courtney Ford (known as Trinity's illegitimate daughter Christina from Dexter and Brandon Routh's real-life wife) and attention Grey's Anatomy fans, Nora Zehetner (who played Stinkerbell on season one of Heroes and who is now Alex's love interest on Grey's). What does this mean for Alex's future love life at Seattle Grace? Hmmm...
According to sources, Kay Panabaker (pictured at right), most recently seen in Fame, will play a young Kitty (Calista). Anna Wood (a newcomer you can see here) will play Sarah (Rachel Griffiths), and Kasey Campbell (ditto on the newcomer status and you can see him here) will play Kevin (Matthew Rhys). Pretty awesome resemblance if you ask me.
I'm told quite a few hot guys are lining up in the hopes of playing the show's dearly departed patriarch, William Walker.
Who would you like to see play the rest of the Walkers? Anyone you think the casting peeps may have overlooked? And are you as psyched about this episode as we are?