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 Angus Sampson voices Additional Voices Hugo Weaving voices Additional Voices Alexandra Daddario voices Additional Voices Co Starring Jarrad Wright voices Additional Voices Liam McIntyre voices Additional Voices Claudia O'Doherty voices Additional Voices Michelle Brasier voices Additional Voices Jordan Shanks voices Additional Voices Natalie Tran voices Additional Voices Mark Coles Smith voices Additional Voices