Cecelia Ahern is an Irish novelist, best known for her works such as PS, I Love You, Where Rainbows End, and If You Could See Me Now. Born in Dublin, Ahern is now published in nearly fifty countries, and has sold over 25 million copies of her novels worldwide. Two of her books have been adapted into major motion pictures. The short story collection Roar has been adapted as a series for Apple TV+.

She and her books have won numerous awards, including the Irish Book Award for Popular Fiction for The Year I Met You. 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.