Cecelia Ahern - Irish writer. Born September 30, 1981 in Dublin, Ireland, the daughter of former Irish Prime Minister Bertie Ahern. Before becoming a writer, Cecilia Ahern graduated from the journalism department of St. Griffiths College. At the age of 21, she wrote her first novel, P.S. I Love You, which was sold in more than 40 countries. In 2007, Warner Bros and Wendy Finerman Productions took up the film adaptation of this work.