Robyn was born in Girraween, New South Wales, to Chris and Janne Lawley; and has two older sisters, Shona and Jennifer. Robyn attended Macarthur Girls High School. Robyn went to see a mainstream agency when she was 15 and although they were ready to sign her, she didn't feel ready. After taking a year off she returned and started doing straight size modeling for a year. Finding it to be not worth the effort of maintaining the size 8 that was required, she signed with Bella model management, a "plus size" modeling agency in Australia, when she was 18.