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 works are published in nearly fifty countries, selling over 25 million copies worldwide. Notably, two of her books have been adapted into major motion films. Her short story collection Roar has been adapted into a series for Apple TV+.

Ahern and her books have won numerous awards, including the Irish Book Award for Popular Fiction for The Year I Met You. Beyond novels, she has contributed to various anthologies and created the ABC comedy series Samantha Who? starring Christina Applegate.