Zoey Deutch as Romulus "Romi" Lupin

— "Other than turning into a raging beast every full moon, nothing interesting at all."

Aaron Taylor Johnson as James Potter

— "I don't know what has you in such a sour mood but I plan to stay on your good side."

Andrew Garfield as Remus Lupin

— "You're just going to try and decapitate him again. You've read enough anyway."

Ben Barnes as Sirius Black

— "I didn't even make the comment! I hardly think that constitutes me being beheaded."

Dane DeHaan as Peter Pettigrew

— "I think she's imagining that's your head, Sirius."

Karen Gillan as Lily Evans

— "You were right to have us check on them."

Freya Mavor as Marlene McKinnon

— "Oi, Lupin. You look like shit."

(These are just my interpretations as to what they look like. Feel free to picture them as whoever/whatever you please.)