First, I know that Shay doesn't fit the book description of any of the Saybrooks, but I don't mind her being any of the Saybrooks. So, going off of Shay only, here is my dream cast for the Saybrooks.
- Shay Mitchell as Corinne Saybrook - Alexandra Shipp as Aster Saybrook - Logan Browning OR Madeline Mantock as Natasha Saybrook-Davis - Katerina Graham or Candice Patton as Poppy Saybrook - Naya Rivera as Rowan Saybrook
- Laura Vandervoort as Katherine Foley - Munro Chambers as James Kenwood (???) - Alyssa Milano as Penelope Keating