- Jane and her husband, David Hewlett, had a son named Sebastian Flynn Loughman Hewlett, on October 6, 2007.
- With her boyfriend David Hewlett, she adopted a dog from a local animal shelter which was scheduled for being euthanized. The Rottweiler-Terrier mix, Mars the Dog, is one of the stars of Jane and David's comedy feature film A Dog's Breakfast (2007).
- Married to David Hewlett, brother of Kate Hewlett.
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