Judith Ann "Judy" Morris (born December 13, 1947 in Queensland, Australia) is an Australian actress, as well as a film director and screenwriter, well known for the variety of roles she played in 54 different television shows and films, but most recently for co-writing a musical epic about the life of penguins in Antarctica which became "Happy Feet", Australia's largest animated film project to date.
The Plumber is a 1979 Australian psychological thriller film about a psychotic plumber who befriends a woman.
 Written and directed by Peter Weir, "The Plumber" was originally made and broadcast as a television film in Australia in 1979 but was subsequently released to theaters in several countries beginning with the United States in 1981.
 The film was made shortly after Weir's critically acclaimed "Picnic at Hanging Rock" became one of the first Australian films to appeal to an international audience.
 The film stars Judy Morris, Ivar Kants, and Robert Coleby, all of them being most notable as actors in Australian soap operas.
The Great Macarthy is a 1975 comedy about Australian rules football.
 It was an adaptation of the novel "A Salute to the Great McCarthy" by Barry Oakley.
 It stars John Jarratt as the title character (in his film debut) as a local footballer who is signed up (or more appropriately, kidnapped) by the South Melbourne Football Club (now Sydney Swans).
 It also stars Barry Humphries and Judy Morris.
 It was released at a time of resurgence in Australian cinema but was not very successful despite its high profile cast.
The Trespassers is a 1976 film directed by John Duigan.
 It stars Judy Morris and Briony Behets.
Mama's Gone A-Hunting is a 1977 Australian television film.
 The title is taken from a nursery rhyme, called Bye Baby Hunting.
 The film featured many well known Australian actors of the period, including Gerard Kennedy, Carmen Duncan, and starred Judy Morris
Alvin and the Chipmunks: The Squeakquel is a 2009 American live-action/computer animated musical family comedy film directed by Betty Thomas.
 It is the second installment in the "Alvin and the Chipmunks" film series, the film stars Zachary Levi, David Cross and Jason Lee with the voices of Justin Long, Matthew Gray Gubler, Jesse McCartney, Amy Poehler, Anna Faris and Christina Applegate.
 It was written by Jon Vitti, Jonathan Aibel and Glenn Berger, distributed by 20th Century Fox, and produced by Fox 2000 Pictures, Regency Enterprises and Bagdasarian Company.
 The film is a sequel to the 2007 film "Alvin and the Chipmunks" and was released in theaters on December 23, 2009 by 20th Century Fox.
 The film grossed $443,140,005 on a $70 million budget making it highest grossing one in the series.
Scobie Malone (also known as Helga's Web and Murder at the Opera House) is a 1975 Australian mystery film based on the novel "Helga's Web" by Jon Cleary and starring Jack Thompson and Judy Morris.
Luigi's Ladies is a 1989 Australian comedy directed by actor Judy Morris.
Happy Feet is a 2006 Australian-American computer-animated musical family comedy film directed, produced, and co-written by George Miller.
 It stars Elijah Wood, Robin Williams, Brittany Murphy, Hugh Jackman, Nicole Kidman, Hugo Weaving, and E.G. Daily.
 It was produced at Sydney-based visual effects and animation studio Animal Logic for Warner Bros., Village Roadshow Pictures, and Kingdom Feature Productions and was released in North American theaters on November 17, 2006.
 It is the first animated film produced by Kennedy Miller in association with Animal Logic.
...Maybe This Time is a 1980 Australian feature film starring Judy Morris.
 It was the first feature directed by Chris McGill.

Question: Who directed the musical family comedy film set in Antarctica which was co-written by  Australian actress Judy Morris?
Answer: George Miller