2022 In 2002, when 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 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 was published just before Christmas 2008 in the UK. Her following book,
The Book of Tomorrow, was published on 1 October 2009. In 2016, Cecelia released
Flawed, her first book for young adults, and
Lyrebird. ==Awards and achievements==