Holly and Kelly are sisters and they are writing the School for Stars series together.
Holly Willoughby lives in London with her husband and children. She is best known for presenting prime-time television shows: SURPRISE, SURPRISE (average 4.6 million viewers) and THIS MORNING (average 1.5 - 2 million viewers daily).
Kelly Willoughby lives in West Sussex with her husband and daughter.
You can follow Holly and Kelly on Twitter @hollywills and @LadyWilloughby. Holly's website is www.officialhollywilloughby.com