Who Worth the Cast for The Mortal Instruments Series?

I bought the fourth book of the mortal instruments series, "City of the Fallen Angel", and I was thinking, "this should be on theatre soon!". i googled and find nothing but any prediction about the movie, including the cast. You know, that's sorta fun to guess who might fit to play one of the mortal instruments' cast, so I have my own idea about the cast, let's start!

JACE WAYLAND

Blonde and resent face, just as Ms Clare said. Mr Pettyfer was the right man to play as Jace Wayland.

Carissa Fray

Ms Roberts won everyone's heart to play Clarissa Fray, she gracefully won my heart too.

Simon Lewis

He looks really like Simon, don't he? Yeah, we'll never actually saw Simon, but you can just agree so I can continue to the next cast. :D what a jerky nasty chongkey...

Isabelle Lightwood

Either Megan Fox, or...

...Dakota Fanning was the one who might suits Isabelle Lightwood.

but Ms Fox is waaaaay too hot...

Alec Lightwood

Either this guy, or...

...this guy. Anyone, I don't care. they both  the same.

Magnus Bane

Magnus "Blinky" Bane, this guy have enough sparkle to be Magnus. look at that, um, what-the-name on his arms (for now, let's call it gloves), very Magnus.

Well, if you have any different idea about who fits Clary, or who fits Magnus, or whoever, just leave some comment.

cheers!