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).