- She graduated from the Victorian College of the Arts (Melbourne, Australia) in 1999
- Appointed as a member of Australia's Advertising Standards Bureau in August 2006.
- Her father is a management consultant and her mother is a pathologist. Her parents named her Sibylla after the Greek word for prophet.
- Her brother Alex, is the tour manager for OzOpera, the educational and touring arm of Opera Australia. She has 2 other brothers Hamilton and Henry.
- Has 2 sons with her husband Peter Carstairs - Albie Carstairs (b.2011) and Freddy Carstairs (b.March 2015).
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