Graham Phillips as Ben Tennyson

Christien Anholt as Eon

Haley Ramm as Gwen Tennyson

Beth Littleford as Sandra Tennyson

Don McManus as Carl Tennyson

Sab Shimono as Old Man

Aloma Wright as Mrs. Dalton

Robert Picardo as Principal White

Lee Majors as Grandpa Max Tennyson

Tyler Patrick Jones as Cash

Tyler Foden as T-J

Paige Hurd as Stephanie

Bianca Ruiz Brockl as Candace

David Franklin as Heatblast (voice)

Carlos Alazraqui as Grey Matter (voice)

Daran Norris as Diamondhead (voice)

Dee Bradley Baker as Wildmutt (voice)

Antoinette Spolar as Talent Show Teacher

Mitch Watson as Stage Manager

Jeff Jensen as Mr. Hawkins

Michael Runyard as Fire Chief Whittington

Joey Box as Police Officer #1

Trampas Thompson as Police Officer #2

Alex Winter as Constantine Jacobs

Rich Ting as Heatblast

Andrew John Ferguson as Kid on Bike

Marilyn Zack as Woman in Curlers