These are the people I pictured as the characters. You, obviously, do not have to picture them, but they are who I am using in my trailer and the pictures for the chapters.
Ben Barnes as Sirius Black
Aaron-Taylor Johnson as James Potter
Freya Mavor as Marlene McKinnon
Andrew Garfield as Remus Lupin
Karen Gillan as Lily Evans
Jamie Bell as Peter Pettigrew
Sarah Bolger as Charlotte Riggs