Bridget Sutterlee as Aliyah Stones

Nina Dobrev as Emma Scott

Victor Justice as Jessica Kevin

Jessica Conte as Jasmine Ryan

Cody Christian as Daniel Scott

Froy Gutierrez as Dylan Parker

Francisco Lachowski as Brandon Miller

Sean O'Donnell and as Jaxon Grayson

Lucy Hale as Amelia Edward or Amy

Barbara Palvin as Claire Smith

Maia Mitchel as Clairess Smith

Few points to make it easier to understand for you guys:

They all go to the same university.

Aliyah, Emma, Jessica, Jasmine are best friends
Daniel, Dylan, Brandon, Jaxon are best friends
Amelia, Claire, Clairess are best friends and the bully's of Uni

Claire and Clairess are sisters
Emma and Daniel are siblings

Guys this is just my imagination of how I find them but you guys can imagine the characters however you want them to be like