Miranda Cosgrove
Carly Shay

Jennette McCurdy
Sam Puckett

Nathan Kress
Freddie Benson

Jerry Trainor
Spencer Shay

Noah Munck
Gibby Gibson / Gibby Gibson (archive footage)

Mary Scheer
Marissa Benson / Marissa Benson (archive footage) / Marissa Benson (voice)

BooG!e
T-Bo

Jeremy Rowley
Lewbert Sline / Lewbert Sline (voice) / Lewbert Sline (archive footage)

Reed Alexander
Nevel Papperman / Nevel Papperman (archive footage)

Colin Spensor
Wesley

Ethan Munck
Guppy Gibson / Guppy Gibson (archive footage) / 5-Year-Old Gibby

Tim Russ
Ted Franklin / Ted Franklin (archive footage) / Ted Franklin (voice)

Mindy Sterling
Francine Briggs / Francine Briggs (archive footage)

Mary Ann Springer
Wendy / Bad Girl

Andrew Hill Newman
George (voice) / Albert Einstein / Mr. Henning

David St. James
Mr. Howard

Ryan Ochoa
Chuck / Chuck (archive footage)

Victoria Justice
Tori Vega / Shelby Marx / Shelby Marx (archive footage)

Lane Napper
Lane / Dancing Teacher / Ernie / Ernie (archive footage)

Sean Smith
Dr. Dresdin