Cecelia Ahern is an Irish novelist, renowned for her works such as PS, I Love You, Where Rainbows End, and If You Could See Me Now. Born in Dublin, Ahern's novels are now published in nearly fifty countries and have sold over 25 million copies worldwide. Notably, two of her books have been adapted into major motion films.

Ahern's short story collection Roar has been adapted as a series for Apple TV+. Her literary contributions have earned her numerous awards, including the Irish Book Award for Popular Fiction for The Year I Met You. In addition to several novels, she has contributed short stories to various anthologies.

Ahern is also the creator and producer of the ABC comedy Samantha Who?, starring Christina Applegate.