Family

Michelle Fairley as Euphemia Potter 

Adrian Rawlins as Fleamont Potter

Rowena the owl

Nimbus the puppy

The Marauders

Aaron Johnson as James Potter

Ben Barnes as Sirius Black

Andrew Garfield as Remus Lupin

Jamie Bell as Peter Pettigrew

The Girls

Karen Gillan as Lily Evans

Freya Mavor as Marlene McKinnon (I'm really sorry all of the GIFs I could find for her won't work. Just Google up Freya Mavor. The picture I'm imagining is the one where she smiles and looks down, the 7th one)

Anna Kendrick as Emmeline Vance

Carey Mulligan as Alice Fortescue

Other Friends

Timothee Chalamet as Regulus Black

James and Oliver Phelps as Fabian and Gideon Prewett

Enemies

Orlando Bloom as Lucius Malfoy

Benedict Clarke as Severus Snape

Sarah Gadon as Narcissa Black

Katie McGrath as Bellatrix Black