After completing a degree in Journalism and Media Communications, Cecelia wrote her first novel at just 21 years old. Her debut novel, PS I Love You was published in January 2004, and was No.1 on the Irish book charts for 19 weeks. PS I Love You was adapted into a star-studded movie starring Hilary Swank and Gerard Butler. Another of Cecelia's books 'Love Rosie' was also adapted into a movie and starred Lily Collins and Sam Claflin.
Cecelia co-created the ABC comedy starring Christina Applegate and Melissa McCarthy. She is also the face of Littlewoods Ireland and has received a multitude of awards for her writing.
Cecelia has published a novel every year since 2004 and to date has published 15 novels and counting. She has finally wrote the follow-up to PS I Love You with Postscript. The sequel is out September of this year.