Peter Spierig is a German-Australian film directors, producers, and screenwriters. Identical twin brothers Peter Spierig and Michael Spierig  born 29 April 1976, known together professionally as The Spierig Brothers. Peter and Michael made their directing debut in 2003 with Undead and won a prize for Best Visual Effects at the Australian Film Institute Awards for their second film Daybreakers (2010) starring Ethan Hawke and Willem Dafoe. They write, direct, and produce their films together, and are heavily involved in the editing, sound, and visual effects of all their work. Their 2014 film, Predestination, based on the science fiction short story "—All You Zombies—" by Robert A. Heinlein, opened at SXSW in March 2014. It was co-written and co-directed by the twins, and was filmed in Australia during Spring of 2013. It stars Ethan Hawke, Sarah Snook, and Noah Taylor. The film was positively received by critics, including those of Variety, The Guardian, and IGN Movies. Peter and Michael created their first film, Undead, a low-budget zombie horror-comedy film, after they agreed on pooling together their life savings. "Undead" screened at 17 film festivals, including Edinburgh, Montreal, Toronto, Sitges, Berlin, Amsterdam and Puchon. At the Melbourne International Film Festival, the International Federation of Film Critics awarded "Undead" the prestigious Fipresci Award. The film was sold to 41 countries, and was released in the US and Canada by Lions Gate Entertainment, who developed a close relationship with Peter and Michael, and backed their second production "Daybreakers."  Their second feature film Daybreakers starred two-time Academy Award nominee Ethan Hawke, Willem Dafoe, Sam Neill, Claudia Karvan, Vince Colosimo, Michael Dorman, and Isabel Lucas. The Spierig brothers's third film is the action sci-fi thriller Predestination based on the science fiction short story '"—All You Zombies—" by Robert A. Heinlein. The two directed the eighth Saw film, Jigsaw, which was released on 27 October 2017. Their next film was Winchester: The House That Ghosts Built, a horror film about the Winchester Mystery House, starring Helen Mirren as heiress Sarah Winchester, and released on 2 February 2018.

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