Special Guest Stars Hugh Jackman voices Big Greg Guest Stars Jemaine Clement voices Principal Bazwell Jemaine Clement voices Additional Voices Rachel House voices Additional Voices Hugo Weaving voices Additional Voices Angus Sampson voices Additional Voices Co Starring Jarrad Wright voices Additional Voices Claudia O'Doherty voices Additional Voices Liam McIntyre voices Additional Voices Nazeem Hussain voices Additional Voices