Ms. Julie
Alec Baldwin
Sara Bareilles
Riley
Joshua Bell
Hugo
Tituss Burgess
Mrs. Edna Brightful
Chris Colfer
Spike
Peri
Fizz
Robert Fairchild (as Robert Fairchild)
Gus
Josh Groban
David Hyde Pierce
Bill Irwin
Ellie Kemper
Toby
Additional Puppeteer
Idina Menzel
Tiler Peck
Hank