Here is what actors/actresses I would choose to play each character. And yes I know people usually do this at the start of a story but oh well.

Sabrina: Sabrina Carpenter

Selena: Marie Avgeropoulos

Jack: Chris Galya

Elijah: Peyton Meyer

Andrea: China Anne McClain

Danny: Alex Pettyfer

Jerrold: Some random dude

Victor: Robbie Amell

Colton: Brett Davern

Deanna: Sarah Jeffery