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 Co Starring Jarrad Wright voices Additional Voices Liam McIntyre voices Additional Voices Michelle Brasier voices Additional Voices Steph Tisdell voices Additional Voices Anthony Salame voices Additional Voices David Ashby voices Additional Voices Dario Russo voices Additional Voices