Special Guest Stars Hugh Jackman voices Big Greg Guest Stars Jemaine Clement voices Principal Bazwell Jemaine Clement voices Additional Voices Angus Sampson voices Additional Voices Co Starring Jarrad Wright voices Additional Voices Michelle Brasier voices Additional Voices Anthony Salame voices Additional Voices Leigh Joel Scott voices Additional Voices Nina Oyama voices Additional Voices Aaron Chen voices Additional Voices Ian Zaro voices Additional Voices