These are the people that I picture the characters looking like or similar to. That doesn't mean you can't picture them as someone else of course, but here they are....

1.) Ansel Elgort as Tyler Mason

The daredevil

2.) Sean Patrick Thomas as Derek Thompson

The Best Friend

3.) Alexis Knapp as Stacey Lou

The Party Girl

4.) Jessy Schram as Margaret (Maggie) Johansson

The Thrill Seeker

5.) Willow Shield as Lily McKinley

The Kindhearted Innocent

(Sorry that one's a little blurry)

6.) David Castro as Dylan McKinley

The Brother