David Coburn

Donnie Wahlberg / Nikko the Dog (voice)

Brian Stokes Mitchell

Danny Wood (voice)

Loren Lester

Jordan Knight (voice)

Scott Menville

Joey McIntyre (voice)

Matt E. Mixer

Jonathan Knight (voice)

Donnie Wahlberg

Self (live-action segments)

Danny Wood

Self (live-action segments)

Jordan Knight

Self (live-action segments)

Joey McIntyre

Self (live-action segments)

Jonathan Knight

Self (live-action segments)