What is your favorite cast for The Host movie?

I want to see Odette Yustman as Melanie. she's my no 1 choice but if she can't, Jana Kramer, Minka Kelly or Missy Peregrym can play her, though they're older than Mel's age. Camilla Belle can be nice, too.
For Wanda, I thought Rachel Hurd Wood, Brittany Robertson or Annasophia Robb can be pretty good. The first one is my no 1 choice.
For Ian, I wish to see Henry Cavill but if he doesn't play Ian then Matt Dallas with contacts.
I wouldn't mind it if they find some better guy with darker blue eyes,though.
I'd be very happy if Jensen Ackles played Jared. If not him, Ryan Reynolds, Chris Pine or Justin Hartley.
As Doc, Paul Bettany would be the best choice. If not him, then Mke Pellegrino.
As the seeker, Thandie Newton, Jada Pinkett Smith or Christina Ricci
As Kyle, Andy Whitfield
As Sharon, Laura Prepon or Jennifer Morisson from House.
As Sunny, Rachel Bilson, Camille Guaty or Shiri Appleby
This is my cast so far.

Sophia Bush or Kristen Bell, with dyed hair…or Kristin Kreuk…or Thandie Newton should play the Seeker
Taylor Swift or Ashley Benson or Brittany Robertson or Emily de Raven or Elisabeth Harnois should play Wanda
Shay Mitchell should play Melanie Stryder FOR SUREEE
    *if she can’t, then Jana Kramer or Odette Yustman with a tan or Minka Kelly with a tan might be ok. All these girls seem too white though.
Casey Affleck or Tom Welling or Kellan Lutz or Johann Urb should play Ian
Paul Walker or Jensen Ackles or Ashton Kutcher should play Jared
Ben Affleck or Colin Farrell or Sebastián Fillol.. or Andy Whitfield or Nick Zano or Channing Tatum should play Kyle
Callum Keith Rennie or Tom Selleck as Doc or Jeb
Gerard Butler or Jeff Bridges or Ryan Reynolds as Doc
Rachel Bilson or Mila Kunis or Rachel Leigh Cook as Sunny/Jodie
Milla Jovovich or Isla Fisher or Amy Adams as Melanie’s cousin Sharon
Sigourney Weaver as Maggie
Jake Austin as Jamie Stryder

I don't have any idea on the rest of the cast, but I was picturing Julianne Moore as Melanie the whole time I was reading. Even though she doesn't fit the exact description, she gives off a sense of strength and definitely fits the body type.

Melanie.. i think some like Sophia Bush is a good pick.. you need someone strong and curvy.. not too thin!
Jared.. easy one..Sam Worthington or Yani Gellman
Ian.. another easy one..Luke Evans
Doc.. David Thewlis would be good.. someone not to young and still loveable (but slightly scary!)
Jamie.. Kiowa Gordon with his longer hair
Wanda.. Chloe Moretz or Anna Sophia Robb

So far.. those i know for sure! the others i still haven't decided on..