Here is a list of actors who I think will be appropriate for the series. (yeah i know lists technically arent allowed so please no flames. thanks.)
Ashley- Sasha Pieterse (Pretty Little Liars)
Danny- Steve Zahn (Diary of a Wimpy Kid)
Sam- Grey Delisle (Fairly Odd Parents)
Tucker- Dule Hill (the West Wing, Psych)
Jazz- Colleen O'Shaunessey (Marvel's Avengers)
Raquel- Ashley Tisdale (High School Musical, Phineas and Ferb)
Logan- E.G. Daly (Rugrats)
Vivica- Melissa Joan Hart (a play on the fact that Martin Mull, who played the principal on Hart's show "Sabrina the Teenage Witch", played Plasmius on the original "DP" series- god! I just love stuff like that!)
Dr. Doctor- myself (you should see my acting/singing- it's almost as good as my writing/drawing)
Marlene- Janelle Parish (Pretty Little Liars)
Candace- Alicia Silverstone (Clueless)
Ulala- Oprah Winfrey
Moira- Donna Murphy (Disney's Tangled)
Skulker- Kevin Michael Richardson (Lilo and Stitch)
Walker- James Arnold Taylor (Johnny Test, Drawn Togeather)
Chuck Carlton- Tom Kenny (Spongebob Squarepants)
Mr. Iwerks- Phil Lewis (Sweet Life series)
Ms. Mackelroy- Jodi Benson (The Little Mermaid)
The Librarian- Paige O'Hara (another play on the fact that Belle, O'Hara's character in Beauty and the Beast, loves to read. Oh, I love myself!)
Justin- Mitchell Musso (Hannah Montana)
Jason- Ryan Merrimen (Pretty Little liars)
Ursula- Cheryl Chase (Rugrats)
Tiffany- Janice Kawaye (My Life as a Teenage Robot)
Aria- Olivia Olsen (Phineas and Ferb, Adventure Time)
Hilary- Troian Bellasario (Pretty Little Liars)
Jen- Jennifer Stone (Wizards of Waverly Place)