Cecelia Ahern is an Irish novelist since 2004. She has published several novels and contributed a number of short stories to various anthologies. Ahern also created and produced the ABC comedy Samantha Who? starring Christina Applegate.
In 2002, when Cecelia Ahern was twenty-one, she wrote her first novel, PS, I Love You. Published in 2004, it was the number 1 bestseller in Ireland (for 19 weeks), the United Kingdom, U.S., Germany and the Netherlands. It is sold in over forty countries. The book was adapted as a motion picture directed by Richard LaGravenese and starring Hilary Swank and Gerard Butler. It was released in the United States on 21 December 2007.
Her second book, Where Rainbows End (U.S. Love, Rosie), also reached number 1 in Ireland and the UK, and won the German CORINE Award in 2005. It was adapted as a motion picture titled Love, Rosie which was released in 2014, directed by Christian Ditter and starring Lily Collins and Sam Claflin.
She has contributed to charity books with the royalties from short stories such as Irish Girls are Back in Town and Ladies' Night.
Cecelia was the co-creator with (along with Donald Todd) and producer of the ABC comedy Samantha Who? starring Christina Applegate, Jean Smart, Jennifer Esposito, Barry Watson, Kevin Dunn, Melissa McCarthy and Tim Russ.
Her book The Gift and was published just before Christmas 2008 in the UK. Her following book, The Book of Tomorrow, was published on the 1 October 2009.