Can someone tell me if there is a guy that looks like leighton meester?

i have a project and i need to do a movie poster for a book called "girl in blue" and i was going to do leighton meester for the main girl character, and i was wondering if there is a guy that looks like her. brown eyes, brown hair, american, olive skin, etc. and also anyone that has read the book are there any other suggestions for the other characters.....(rose greenhow, little rose, colonel sheldon, dr hammond, etc) thanks