Disclaimer: This is just how I see them in my head if you picture someone else disregard.
Double disclaimer: these fancasts and all the outfits are from 2019 and early 2020 (I am talking about like lockdown days when I hadn't left my house in 2 months) so keep that in mind while reading some fashion trends and character choices have aged better than others.

Sydney Rider- Dove Cameron

Aaron Rider- Jacob Elordi

Matthew Dean- Sage Bender

Julia- Sydney Sweeney

Kyle-Tim Schaecker

Amanda- Holland Roden

Tyler- Zach Cox (But with dirty blonde hair instead of brown)